Annual report pursuant to Section 13 and 15(d)

SUBSEQUENT EVENTS - Internalization and Acquisition of PRO (Details)

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SUBSEQUENT EVENTS - Internalization and Acquisition of PRO (Details) - Subsequent Event
Feb. 24, 2020
shares
Executive chairman and former chief executive officer | SecurCare  
Subsequent Event [Line Items]  
Related party ownership interest (percent) 53.00%
SecurCare | Series SC subordinated performance units  
Subsequent Event [Line Items]  
Units to be converted immediately prior to internalization transaction (in units) 2,015,808
SecurCare | OP units  
Subsequent Event [Line Items]  
Units to be issued for internalization transaction (in units) 384,020
Units to be issued upon conversion immediately prior to internalization transaction (in units) 6,769,083
SecurCare and DLAN  
Subsequent Event [Line Items]  
Common shares expected to be issued upon conversion of units (in shares) 8,105,192
Discount on unit to common share conversion (percent) 1.00%
SecurCare and DLAN | OP units  
Subsequent Event [Line Items]  
Units expected to be owned or have right to receive (in units) 8,187,052
SecurCare and DLAN | Executive chairman and former chief executive officer  
Subsequent Event [Line Items]  
Common shares expected to be issued upon conversion of units (in shares) 4,100,000