Condensed Consolidated Statements of Comprehensive Income (Unuaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 51,787	$ 98,227	$ 204,601	$ 392,355
Available for sale securities:
Change in net unrealized (losses) gains	(1)	14	19	145
Less: reclassification adjustment for net losses (gains) included in net income	0	1	0	(20)
Net change (net of tax effect)	(1)	15	19	125
Gain on pension liability	0	0	1,050	8
Cash flow hedges:
Change in unrealized (losses) gains	(554)	1,733	(1,288)	(394)
Less: reclassification adjustment for net (gains) losses included in net income	(292)	390	(2,994)	1,061
Net change (net of tax effect)	(846)	2,123	(4,282)	667
Other comprehensive (loss) income	(847)	2,138	(3,213)	800
Comprehensive income	$ 50,940	$ 100,365	$ 201,388	$ 393,155