Accumulated Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Before - Tax
Other comprehensive (loss) income	$ (193,420)	$ 83,250	$ 61,909
Tax Effect
Other comprehensive (loss) income	58,714	(20,517)	(22,143)
Net-of- Tax
Other comprehensive (loss) income	(134,706)	62,733	39,766
AFS Debt Securities
Before - Tax
Net unrealized (losses) gains arising during the period	(194,393)	89,868	65,549
Net realized gains reclassified into net income	(1,568)	(12,299)	(3,930)
Other comprehensive (loss) income	(195,961)	77,569	61,619
Tax Effect
Net unrealized gains (losses) arising during the period	57,547	(26,539)	(19,379)
Net realized gains reclassified into net income	464	3,636	1,162
Other comprehensive (loss) income	58,011	(22,903)	(18,217)
Net-of- Tax
Net unrealized gains (losses) arising during the period	(136,846)	63,329	46,170
Net realized gains reclassified into net income	(1,104)	(8,663)	(2,768)
Other comprehensive (loss) income	(137,950)	54,666	43,402
Cash Flow Hedges
Before - Tax
Net unrealized (losses) gains arising during the period	1,210	(1,604)	0
Net realized gains reclassified into net income	868	(113)	0
Other comprehensive (loss) income	2,078	(1,717)	0
Tax Effect
Net unrealized gains (losses) arising during the period	(344)	455	0
Net realized gains reclassified into net income	(247)	32	0
Other comprehensive (loss) income	(591)	487	0
Net-of- Tax
Net unrealized gains (losses) arising during the period	866	(1,149)	0
Net realized gains reclassified into net income	621	(81)	0
Other comprehensive (loss) income	1,487	(1,230)	0
Foreign Currency Translation Adjustments
Before - Tax
Net unrealized (losses) gains arising during the period	463	7,398	290
Other comprehensive (loss) income	463	7,398	290
Tax Effect
Net unrealized gains (losses) arising during the period	1,294	1,899	(3,926)
Other comprehensive (loss) income	1,294	1,899	(3,926)
Net-of- Tax
Net unrealized gains (losses) arising during the period	1,757	9,297	(3,636)
Net realized gains reclassified into net income	0	0	0
Other comprehensive (loss) income	$ 1,757	$ 9,297	$ (3,636)