Derivative Financial Instruments - Impact of Derivatives on Consolidated Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flow Hedges
Interest expense	$ 382,078	$ 541,667	$ 707,717
Trading
Total	41,801	66,164	12,789
Designated as Hedging Instrument
Fair Value Hedges
Interest recognized on derivatives	85,850	71,668	(8,806)
Hedged items recorded in interest expense	103,450	(91,087)	(77,350)
Derivatives recorded in interest expense	(103,431)	91,419	77,177
Trading
Total	85,869	72,000	(8,979)
Designated as Hedging Instrument | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Reclassification out of Accumulated Other Comprehensive Income
Cash Flow Hedges
Interest expense	(20,852)	(16,000)	2,299
Trading
Trading
Change in fair value of future interest payments recorded in earnings	(23,216)	10,164	19,469
Total	$ (23,216)	$ 10,164	$ 19,469