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Equity - Changes to Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance at beginning of period $ 1,110,899 $ 1,827,231 $ 1,348,794
Total other comprehensive loss (4,706) (45,734) (19,784)
Balance at End of Period 1,386,087 1,110,899 1,827,231
Net Unrealized Gains on Available-for-Sale Securities      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance at beginning of period 76,336 92,452  
Other comprehensive income (loss) before reclassifications 8,016 (3,951)  
Amounts reclassified from other accumulated comprehensive income (loss) (16,849) (12,165)  
Total other comprehensive loss (8,833) (16,116)  
Balance at End of Period 67,503 76,336 92,452
Net Unrealized Losses on Interest Rate Agreements Accounted for as Cash Flow Hedges      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance at beginning of period (80,557) (50,939)  
Other comprehensive income (loss) before reclassifications 0 (32,806)  
Amounts reclassified from other accumulated comprehensive income (loss) 4,127 3,188  
Total other comprehensive loss 4,127 (29,618)  
Balance at End of Period $ (76,430) $ (80,557) $ (50,939)