Stockholders' Equity (Categories of Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income, Beginning Balance			$ (31,827)
Other comprehensive income (loss)	$ 61,193	$ (11,308)	(49,999)	$ (33,550)
Other comprehensive income, Ending Balance	(81,826)		(81,826)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income, Beginning Balance	(141,045)	(60,456)	(60,012)	679
Other comprehensive income (loss)	13,049	(17,148)	(67,984)	(78,283)
Other comprehensive income, Ending Balance	(127,996)	(77,604)	(127,996)	(77,604)
Unrealized Gains on Investment Securities Available for Sale
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income, Beginning Balance	(1,974)	43,087	28,185	4,194
Other comprehensive income (loss)	48,144	5,840	17,985	44,733
Other comprehensive income, Ending Balance	46,170	48,927	46,170	48,927
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income, Beginning Balance	(143,019)	(17,369)	(31,827)	4,873
Other comprehensive income (loss)	61,193	(11,308)	(49,999)	(33,550)
Other comprehensive income, Ending Balance	$ (81,826)	$ (28,677)	$ (81,826)	$ (28,677)