Shareholders' Equity (Reclassification from Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains (losses) on investment securities, net	$ 439	$ 1,079	$ 221
Income tax expense	190,873	171,645	96,791
Interest on deposits	175,202	88,119	189,178
Interest on junior subordinated debentures	10,252	10,916	11,008
Net income	509,682	466,151	$ 292,990
Reclassification out of Accumulated Other Comprehensive Income | Accumulated unrealized gains on available-for-sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains (losses) on investment securities, net	439	1,079
Income before taxes	439	1,079
Income tax expense	(118)	(290)
Net income	321	789
Reclassification out of Accumulated Other Comprehensive Income | Accumulated unrealized gains (losses) on derivative instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before taxes	3,319	(26,883)
Income tax expense	(884)	7,164
Interest on loans	1,443	0
Interest on deposits	(5,675)	19,640
Interest on other borrowings	913	2,560
Interest on junior subordinated debentures	0	4,683
Net income	$ 2,435	$ (19,719)