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Income Taxes - Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax expense at statutory federal income tax rate	$ 207,765	$ 101,779	$ 160,653
State income tax expense, net of federal income tax benefit	38,452	11,168	33,764
Income not subject to tax	(10,455)	(9,207)	(6,564)
Low income housing tax credits and other tax benefits, net of amortization	(4,858)	(2,611)	(1,583)
FDIC premiums	4,111	4,744	5,802
General business tax credits	(3,727)	(657)	(678)
Excess tax benefit from share-based compensation	(3,084)	311	(1,337)
Executive compensation	1,096	1,501	6,385
Goodwill impairment	0	9,424	0
Other, net	(407)	(5,482)	4,793
Total income tax expense	$ 228,893	$ 110,970	$ 201,235
Effective tax rate	23.10%	22.90%	26.30%

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