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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Amount
Income tax expense at federal statutory rate	$ 213,572	$ 227,746	$ 167,575
SALT expense, net of federal	42,059	32,177	32,259
Tax-exempt interest, net	(29,272)	(44,473)	(35,371)
Increase in cash surrender value of life insurance	(5,816)	(5,469)	(6,122)
Non-deductible FDIC deposit insurance premiums	12,305	10,693	5,581
LIHTC and related benefits, net	(13,545)	(3,866)	(7,627)
Non-deductible compensation expense	3,680	4,167	7,948
DTA valuation allowance adjustment, net	31,091	(368)	(9,874)
Other, net	(5,774)	(3,943)	(675)
Income tax expense and effective tax rate	$ 248,300	$ 216,664	$ 153,694
Percent
Income tax expense at federal statutory rate	21.00%	21.00%	21.00%
SALT expense, net of federal	4.10%	3.00%	4.10%
Tax-exempt interest, net	(2.90%)	(4.10%)	(4.40%)
Increase in cash surrender value of life insurance	(0.60%)	(0.50%)	(0.80%)
Non-deductible FDIC deposit insurance premiums	1.20%	1.00%	0.70%
LIHTC and related benefits, net	(1.30%)	(0.40%)	(1.00%)
Non-deductible compensation expense	0.40%	0.40%	1.00%
DTA valuation allowance adjustment, net	3.10%	0.00%	(1.20%)
Other, net	(0.60%)	(0.40%)	(0.10%)
Income tax expense and effective tax rate	24.40%	20.00%	19.30%

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Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes.

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