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Derivative Financial Instruments - Impact of Derivatives on the Statements of Changes in Stockholder's Equity (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]      
Amount of gain (loss) recognized in other comprehensive income (loss) $ (52,511) $ (36,115)  
Amount of gain (loss) recognized in other comprehensive income (loss)     $ 10,452
Less: Amount of gain (loss) reclassified in interest expense (16,000) 2,299  
Less: Amount of gain (loss) reclassified in interest expense     (1,455)
Total change in other comprehensive income (loss) for unrealized gains (losses) on derivatives, before income tax (expense) benefit $ (36,511) $ (38,414)  
Total change in other comprehensive income (loss) for unrealized gains (losses) on derivatives, before income tax (expense) benefit     $ 11,907