Condensed Consolidated Statements of Comprehensive Income (Unuaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 62,766	$ 112,906	$ 152,814	$ 294,128
Available for sale securities:
Change in net unrealized (losses) gains	0	(24)	20	131
Less: reclassification adjustment for net gains included in net income	0	(8)	0	(21)
Net change (net of tax effect)	0	(32)	20	110
Gain on pension liability	0	0	1,050	8
Cash flow hedges:
Change in unrealized gains (losses)	128	458	(735)	(2,127)
Less: reclassification adjustment for net (gains) losses included in net income	(758)	919	(2,701)	671
Net change (net of tax effect)	(630)	1,377	(3,436)	(1,456)
Other comprehensive (loss) income	(630)	1,345	(2,366)	(1,338)
Comprehensive income	$ 62,136	$ 114,251	$ 150,448	$ 292,790