Shareholders' Equity (Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	$ 4,498,688	$ 4,115,995	$ 3,691,250
Other comprehensive loss during the period, net of tax, before reclassifications	(428,844)	(30,043)	36,843
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	(2,756)	18,930	13,386
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(128)	(177)	(169)
Total other comprehensive (loss) income	(431,728)	(11,290)	50,060
Balance at end of period	4,796,838	4,498,688	4,115,995
Accumulated Unrealized Gains (Losses) on Securities
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	8,724	70,737	14,982
Other comprehensive loss during the period, net of tax, before reclassifications	(394,332)	(61,047)	56,086
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	(321)	(789)	(162)
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	(128)	(177)	(169)
Total other comprehensive (loss) income	(394,781)	(62,013)	55,755
Balance at end of period	(386,057)	8,724	70,737
Accumulated unrealized gains (losses) on derivative instruments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	27,111	(23,090)	(13,141)
Other comprehensive loss during the period, net of tax, before reclassifications	(17,295)	30,482	(23,497)
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	(2,435)	19,719	13,548
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	0	0	0
Total other comprehensive (loss) income	(19,730)	50,201	(9,949)
Balance at end of period	7,381	27,111	(23,090)
Accumulated Foreign Currency Translation Adjustments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(31,743)	(32,265)	(36,519)
Other comprehensive loss during the period, net of tax, before reclassifications	(17,217)	522	4,254
Amount reclassified from accumulated other comprehensive income or loss into net income, net of tax	0	0	0
Amount reclassified from accumulated other comprehensive income or loss related to amortization of unrealized gains on investment securities transferred to held-to-maturity from available-for-sale, net of tax	0	0	0
Total other comprehensive (loss) income	(17,217)	522	4,254
Balance at end of period	(48,960)	(31,743)	(32,265)
Total Accumulated Other Comprehensive Income (Loss)
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	4,092	15,382	(34,678)
Balance at end of period	$ (427,636)	$ 4,092	$ 15,382