Parent Company Information (Components of Condensed Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other comprehensive income (loss), net of tax:
Derivative instruments	$ (13,848)	$ 29,102	$ 129
Other comprehensive (loss) income, net of tax	(64,836)	78,328	94,580
Parent Company [Member]
Condensed Statement of Income Captions [Line Items]
Net income	408,864	220,621	382,723
Other comprehensive income (loss), net of tax:
Derivative instruments	226	2,622	1,479
Other comprehensive (loss) income of subsidiaries	(65,062)	75,706	93,101
Other comprehensive (loss) income, net of tax	(64,836)	78,328	94,580
Comprehensive income	$ 344,028	$ 298,949	$ 477,303