Annual report pursuant to Section 13 and 15(d)

Borrowings - MetLife Facility (Narrative) (Details)

v3.22.0.1
Borrowings - MetLife Facility (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Feb. 20, 2020
Dec. 31, 2019
Debt Instrument [Line Items]      
Debt instrument, loans to value ratios 60.00%    
MetLife Credit Facility      
Debt Instrument [Line Items]      
Amount     $ 200,000,000
Line of credit facility, maximum borrowing capacity   $ 75,000,000 75,000,000
Debt instrument, loans to value ratios 60.00%    
MetLife Credit Facility | Notes payable to bank      
Debt Instrument [Line Items]      
Amount $ 75,000,000    
Undrawn commitment $ 38,100,000   $ 21,500,000
MetLife Credit Facility | Notes payable to bank | Minimum      
Debt Instrument [Line Items]      
Unused fee 0.10%