Income Taxes (Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Taxes computed at statutory rate, amount	$ 120,534	$ 102,927	$ 138,431
State income taxes, net of federal income tax benefit, amount	12,640	10,323	13,272
Tax-exempt interest, amount	(8,443)	(8,755)	(8,612)
Life insurance contracts, amount	(6,017)	(4,020)	(1,812)
Tax credits, amount	(9,453)	(9,443)	(8,039)
Employee share-based compensation, amount	(1,514)	(505)	(2,084)
FDIC assessment disallowance, amount	2,466	2,893	1,836
Impact of deferred tax asset re-measurement, amount	(435)
Net operating loss carryback under CARES act, amount			238
Other, net, amount	3,380	4,106	1,877
Total expense included in net income	$ 113,158	$ 97,526	$ 135,107
Taxes computed at statutory rate	21.00%	21.00%	21.00%
State income taxes, net of federal income tax benefit	2.20%	2.10%	2.00%
Tax-exempt interest	(1.50%)	(1.80%)	(1.30%)
Life insurance contracts	(1.10%)	(0.80%)	(0.30%)
Tax credits	(1.60%)	(1.90%)	(1.20%)
Employee share-based compensation	(0.20%)	(0.10%)	(0.30%)
FDIC assessment disallowance	0.40%	0.60%	0.30%
Impact of deferred tax asset re-measurement	(0.10%)
Net operating loss carryback under CARES act			0.00%
Other, net	0.60%	0.80%	0.30%
Income tax expense	19.70%	19.90%	20.50%