Derivative Financial Instruments - Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Interest rate swaps, notional amount	$ 1,524,031	$ 1,481,109
Interest rate swaps, net carrying value	(14,388)	(59,668)
Designated as Hedging Instrument [Member]
Interest rate swaps, notional amount	299,600	316,100
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Interest rate swaps, notional amount	996,500	1,021,500
Not Designated as Hedging Instrument [Member]
Interest rate swaps, notional amount	228,000	143,600
Interest Rate Swaps 1 [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Interest rate swaps, notional amount	355,000
Interest rate swaps, net carrying value	7,328
Interest Rate Swaps 1 [Member] | Not Designated as Hedging Instrument [Member]
Interest rate swaps, notional amount	113,988	62,779
Interest rate swaps, net carrying value	3,355	1,319
Interest Rate Swaps 2 [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Interest rate swaps, notional amount	299,555	316,051
Interest rate swaps, net carrying value	(12,329)	(28,689)
Interest Rate Swap [Member]
Interest rate swaps, notional amount	299,600	316,100
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Interest rate swaps, notional amount	641,500	1,021,500
Interest rate swaps, net carrying value	(9,387)	(25,300)
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Interest rate swaps, notional amount	113,988	80,779
Interest rate swaps, net carrying value	$ (3,355)	$ (6,998)