Derivative Financial Instruments - Pre-tax Impact of Terminated Cash Flow Hedges on AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
AOCI Attributable to Parent, Before Tax [Roll Forward]
Beginning Balance	$ 3,406,352	$ 3,428,052
Unrealized gains on terminated hedges arising during the period	0	0
Reclassification adjustments for amortization of unrealized (gains) into net income	(5,298)	(8,274)
Ending balance	3,008,392	3,387,045
Accumulated Gain (Loss), Net, Terminated Cash Flow Hedge, Parent
AOCI Attributable to Parent, Before Tax [Roll Forward]
Beginning Balance	10,239	41,473
Ending balance	$ 4,941	$ 33,199