Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 284,757	$ 266,400	$ 210,544
Available-For-Sale and Transferred Securities:
Unrealized (losses) gains on available-for-sale securities	(151,426)	139,208	77,158
Reclassification adjustment for losses included in net income	(790)	(1,138)	(14,423)
Reclassification adjustment for securities transferred from available-for-sale to held-to-maturity	(3,551)	0	0
Tax effect	39,362	(34,853)	(15,896)
Net of tax amount	(116,405)	103,217	46,839
Cash Flow Hedge:
Unrealized gains (losses) on derivatives used for cash flow hedges	901	(472)	(7,047)
Reclassification adjustment for gains (losses) included in net income	0	0	10,816
Tax effect	(227)	119	(955)
Net of tax amount	674	(353)	2,814
Total other comprehensive (loss) income, net of tax	(115,731)	102,864	49,653
Total Comprehensive Income	$ 169,026	$ 369,264	$ 260,197