CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
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| Statement of Comprehensive Income [Abstract] | ||||
| Net income | $ 16,829 | $ 11,226 | $ 41,843 | $ 33,983 |
| Other comprehensive income (loss) | ||||
| Unrealized gain (loss) on derivative contracts | 3,078 | (476) | 16,733 | (2,715) |
| Reclassification of other comprehensive (income) loss to interest expense | (599) | 428 | (831) | 1,958 |
| Other comprehensive income (loss) | 2,479 | (48) | 15,902 | (757) |
| Comprehensive income | 19,308 | 11,178 | 57,745 | 33,226 |
| Comprehensive income attributable to noncontrolling interests | (13,330) | (9,936) | (27,168) | (29,514) |
| Comprehensive income attributable to National Storage Affiliates Trust | $ 5,978 | $ 1,242 | $ 30,577 | $ 3,712 |
| X | ||||||||||
- Definition Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. Element is intended to be used for early application of Accounting Standards Update 2017-12. No definition available.
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| X | ||||||||||
- Definition Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. Element is intended to be used for early application of Accounting Standards Update 2017-12. No definition available.
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| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount after tax and reclassification adjustments of other comprehensive income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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