National Storage Affiliates Trust Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

DEBT FINANCING - Narrative (Details)

DEBT FINANCING - Narrative (Details) $ in Thousands			12 Months Ended
DEBT FINANCING - Narrative (Details) $ in Thousands	Jul. 29, 2019 USD ($)	Jun. 05, 2018 USD ($)	Dec. 31, 2022 USD ($) property	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jan. 03, 2023 USD ($)	Nov. 14, 2022	Aug. 30, 2022 USD ($)	Jun. 24, 2022 USD ($)	Nov. 09, 2021 USD ($)	Jul. 09, 2021 USD ($) property	May 03, 2021 USD ($)	Oct. 22, 2020 USD ($)	Aug. 30, 2019 USD ($)	Apr. 24, 2019 USD ($)	Dec. 21, 2018 USD ($)	Jun. 30, 2016 USD ($)
Debt Instrument [Line Items]
Carrying value			$ 3,560,570	$ 2,948,944
Repayments of term loan			$ 960,372	1,322,169	$ 546,147
Credit Facility
Debt Instrument [Line Items]
Extension fee (percent)	0.075%
Unsecured debt \| Fed Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			0.50%
Unsecured debt \| Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 1,550,000
Maximum borrowing capacity if expansion option is exercised	$ 1,750,000
Maximum total leverage ratio	60.00%
Maximum total leverage ratio allowable within two quarters of material acquisition	65.00%
Minimum fixed charge coverage ratio	1.5
Maximum unsecured debt to unencumbered asset value ratio	60.00%
Maximum unsecured debt to unencumbered asset value ratio allowable within two quarters of material acquisition	65.00%
Minimum encumbered adjusted net operating income to unsecured interest expense ratio	2.0
Unsecured debt \| Credit Facility \| Fed Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	0.50%
Unsecured debt \| Credit Facility \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (percent)	1.00%
Unsecured debt \| Credit Facility \| LIBOR \| Minimum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)	1.10%
Credit rating pricing election (percent)	0.78%
Unsecured debt \| Credit Facility \| LIBOR \| Maximum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)	1.80%
Credit rating pricing election (percent)	1.65%
Unsecured debt \| Credit Facility \| Base Rate \| Minimum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)	0.10%
Credit rating pricing election (percent)	0.00%
Unsecured debt \| Credit Facility \| Base Rate \| Maximum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)	0.80%
Credit rating pricing election (percent)	0.65%
Unsecured debt \| Term Loan Facility
Debt Instrument [Line Items]
Maximum borrowing capacity if expansion option is exercised		$ 400,000
Debt issued																	$ 100,000
Maximum expansion option																	$ 100,000
Aggregate amount of expansion option exercised		75,000
Carrying value		175,000
Expansion option capacity increase		200,000
Current borrowing capacity		$ 225,000
Minimum number of rating agencies required \| property			2
Unsecured debt \| Term Loan Facility \| Subsequent Event
Debt Instrument [Line Items]
Carrying value						$ 175,000
Unsecured debt \| Term Loan Facility \| Fed Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			0.50%
Unsecured debt \| Term Loan Facility \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			1.00%
Unsecured debt \| Term Loan Facility \| LIBOR \| Minimum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)			1.30%
Credit rating pricing election (percent)			0.90%
Unsecured debt \| Term Loan Facility \| LIBOR \| Maximum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)			1.70%
Credit rating pricing election (percent)			1.75%
Unsecured debt \| Term Loan Facility \| Base Rate \| Minimum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)			0.30%
Credit rating pricing election (percent)			0.00%
Unsecured debt \| Term Loan Facility \| Base Rate \| Maximum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)			0.70%
Credit rating pricing election (percent)			0.75%
Unsecured debt \| 2028 Term loan facility
Debt Instrument [Line Items]
Maximum borrowing capacity if expansion option is exercised																$ 125,000
Effective interest rate (percent)			4.62%
Debt issued																$ 75,000
Carrying value			$ 75,000	75,000
Minimum number of rating agencies required \| property			2
Unsecured debt \| 2028 Term loan facility \| Fed Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			0.50%
Unsecured debt \| 2028 Term loan facility \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			1.00%
Unsecured debt \| 2028 Term loan facility \| LIBOR \| Minimum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)			1.80%
Credit rating pricing election (percent)			1.40%
Unsecured debt \| 2028 Term loan facility \| LIBOR \| Maximum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)			2.35%
Credit rating pricing election (percent)			2.25%
Unsecured debt \| 2028 Term loan facility \| Base Rate \| Minimum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)			0.80%
Credit rating pricing election (percent)			0.40%
Unsecured debt \| 2028 Term loan facility \| Base Rate \| Maximum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)			1.35%
Credit rating pricing election (percent)			1.25%
Unsecured debt \| A2029 Term Loan Facility
Debt Instrument [Line Items]
Debt issued															$ 100,000
Minimum number of rating agencies required \| property			2
Unsecured debt \| A2029 Term Loan Facility \| Interest rate swap
Debt Instrument [Line Items]
Aggregate notional amount															$ 100,000
Unsecured debt \| A2029 Term Loan Facility \| Fed Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			0.50%
Unsecured debt \| A2029 Term Loan Facility \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			1.00%
Unsecured debt \| A2029 Term Loan Facility \| LIBOR \| Minimum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)			1.85%
Credit rating pricing election (percent)			1.40%
Unsecured debt \| A2029 Term Loan Facility \| LIBOR \| Maximum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)			2.30%
Credit rating pricing election (percent)			2.25%
Unsecured debt \| A2029 Term Loan Facility \| Base Rate \| Minimum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)			0.85%
Credit rating pricing election (percent)			0.40%
Unsecured debt \| A2029 Term Loan Facility \| Base Rate \| Maximum
Debt Instrument [Line Items]
Leverage based applicable margin (percent)			1.30%
Credit rating pricing election (percent)			1.25%
Unsecured debt \| 2029 Senior Unsecured Notes
Debt Instrument [Line Items]
Effective interest rate (percent)			3.98%											3.98%
Debt issued														$ 100,000
Carrying value			$ 100,000	100,000
Unsecured debt \| August 2031 Senior Unsecured Notes
Debt Instrument [Line Items]
Effective interest rate (percent)			4.08%											4.08%
Debt issued														$ 50,000
Carrying value			$ 50,000	50,000
Unsecured debt \| August 2030 Senior Unsecured Notes
Debt Instrument [Line Items]
Effective interest rate (percent)			2.99%
Debt issued													$ 150,000
Carrying value			$ 150,000	150,000
Interest rate (percent)													2.99%
Unsecured debt \| A2032 Senior Notes
Debt Instrument [Line Items]
Debt issued													$ 100,000
Interest rate (percent)													3.09%
Unsecured debt \| 2026 Senior Unsecured Notes
Debt Instrument [Line Items]
Effective interest rate (percent)			2.16%									2.16%
Carrying value			$ 35,000	35,000								$ 35,000
Unsecured debt \| May 2031 Senior Unsecured Notes
Debt Instrument [Line Items]
Effective interest rate (percent)			3.00%									3.00%
Carrying value			$ 90,000	90,000								$ 90,000
Unsecured debt \| May 2033 Senior Unsecured Notes
Debt Instrument [Line Items]
Effective interest rate (percent)			3.10%									3.10%
Carrying value			$ 55,000	55,000								$ 55,000
Unsecured debt \| November 2030 Senior Unsecured Notes
Debt Instrument [Line Items]
Effective interest rate (percent)			2.72%							2.72%
Carrying value			$ 75,000	75,000						$ 75,000
Unsecured debt \| November 2031 Senior Unsecured Notes
Debt Instrument [Line Items]
Effective interest rate (percent)			2.81%							2.81%
Carrying value				175,000						$ 175,000
Unsecured debt \| November 2033 Senior Unsecured Notes
Debt Instrument [Line Items]
Effective interest rate (percent)			2.96%							2.96%
Carrying value			$ (125,000)	0						$ 125,000
Unsecured debt \| 2036 Senior Unsecured Notes
Debt Instrument [Line Items]
Effective interest rate (percent)			3.06%							3.06%
Carrying value				75,000						$ 75,000
Unsecured debt \| June 2029 term loan facility
Debt Instrument [Line Items]
Maximum borrowing capacity									$ 285,000
Effective interest rate (percent)			5.37%
Carrying value			$ 285,000	0
Increase limit									15,000
Higher borrowing capacity option									$ 300,000
Unsecured debt \| June 2029 term loan facility \| Base Rate \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			0.55%
Unsecured debt \| June 2029 term loan facility \| Base Rate \| Minimum \| Variable Rate Component One
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			0.075%
Unsecured debt \| June 2029 term loan facility \| Base Rate \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			1.20%
Unsecured debt \| June 2029 term loan facility \| Base Rate \| Maximum \| Variable Rate Component One
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			1.20%
Unsecured debt \| June 2029 term loan facility \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			1.00%
Unsecured debt \| June 2029 term loan facility \| Secured Overnight Financing Rate (SOFR) \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			1.55%
Unsecured debt \| June 2029 term loan facility \| Secured Overnight Financing Rate (SOFR) \| Minimum \| Variable Rate Component One
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			1.075%
Unsecured debt \| June 2029 term loan facility \| Secured Overnight Financing Rate (SOFR) \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			2.20%
Unsecured debt \| June 2029 term loan facility \| Secured Overnight Financing Rate (SOFR) \| Maximum \| Variable Rate Component One
Debt Instrument [Line Items]
Basis spread on variable rate (percent)			2.20%
Unsecured debt \| November 2032 Senior Unsecured Notes
Debt Instrument [Line Items]
Effective interest rate (percent)			5.06%					5.06%
Carrying value			$ 200,000	0
Senior unsecured notes								$ 200,000
Unsecured debt \| April 2029 term loan facility
Debt Instrument [Line Items]
Effective interest rate (percent)			4.27%												4.27%
Carrying value			$ 100,000	100,000
Unsecured debt \| 2023 Term loan facility
Debt Instrument [Line Items]
Effective interest rate (percent)			2.83%
Carrying value			$ 175,000	175,000
Unsecured debt \| 2023 Term loan facility \| Subsequent Event
Debt Instrument [Line Items]
Carrying value						175,000
Line of Credit \| Credit Facility \| Subsequent Event
Debt Instrument [Line Items]
Maximum borrowing capacity						1,955,000
Current borrowing capacity						405,000
Increase limit						2,500,000
Mortgages \| Fixed rate mortgages payable
Debt Instrument [Line Items]
Effective interest rate (percent)			3.82%
Carrying value			$ 299,570	303,944
Mortgages \| Fixed rate mortgages payable \| Minimum
Debt Instrument [Line Items]
Effective interest rate (percent)			3.63%
Mortgages \| Fixed rate mortgages payable \| Maximum
Debt Instrument [Line Items]
Effective interest rate (percent)			4.65%
Mortgages \| 2028 Fixed Rate Mortgage Payable
Debt Instrument [Line Items]
Debt issued											$ 88,000
Interest rate (percent)											2.77%
Number of properties securing debt \| property											8
Revolving line of credit \| Credit Facility \| Minimum
Debt Instrument [Line Items]
Usage based fees with respect to unused portion of Revolver (percent)	0.15%
Ratings based fees if credit pricing elected (percent)	0.125%
Revolving line of credit \| Credit Facility \| Maximum
Debt Instrument [Line Items]
Usage based fees with respect to unused portion of Revolver (percent)	0.20%
Ratings based fees if credit pricing elected (percent)	0.30%
Revolving line of credit \| Line of Credit \| Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 650,000
Effective interest rate (percent)			5.69%
Revolving line of credit remaining borrowing capacity			$ 147,800
Carrying value			496,000	490,000
Revolving line of credit \| Line of Credit \| Credit Facility \| Subsequent Event
Debt Instrument [Line Items]
Maximum borrowing capacity						950,000
Current borrowing capacity						650,000
Term loan A \| Unsecured debt \| Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 125,000
Effective interest rate (percent)			3.74%
Carrying value			$ 125,000	125,000
Term loan A \| Unsecured debt \| Credit Facility \| Subsequent Event
Debt Instrument [Line Items]
Maximum borrowing capacity						125,000
Term loan B \| Unsecured debt \| Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 250,000
Effective interest rate (percent)			2.94%
Carrying value			$ 250,000	250,000
Term loan B \| Unsecured debt \| Credit Facility \| Subsequent Event
Debt Instrument [Line Items]
Maximum borrowing capacity						275,000
Current borrowing capacity						250,000
Term loan C \| Unsecured debt \| Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 225,000
Effective interest rate (percent)			2.91%
Carrying value			$ 225,000	225,000
Term loan C \| Unsecured debt \| Credit Facility \| Subsequent Event
Debt Instrument [Line Items]
Maximum borrowing capacity						325,000
Current borrowing capacity						225,000
Term loan D \| Unsecured debt \| Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 175,000
Effective interest rate (percent)			3.12%
Carrying value			$ 175,000	175,000
Term loan D \| Unsecured debt \| Credit Facility \| Subsequent Event
Debt Instrument [Line Items]
Maximum borrowing capacity						275,000
Current borrowing capacity						175,000
Term loan E \| Unsecured debt \| Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 125,000
Effective interest rate (percent)			5.59%
Carrying value			$ 125,000	$ 125,000
Interest rate (percent)							4.86%
Term loan E \| Unsecured debt \| Credit Facility \| Subsequent Event
Debt Instrument [Line Items]
Maximum borrowing capacity						130,000
Current borrowing capacity						$ 125,000
Letter of credit \| Line of Credit \| Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding			$ 6,200