Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards	$ 34,700
Deferred tax assets, state net operating loss carryforward		$ 15,900
Tax Adjustments, Settlements, and Unusual Provisions	2,300	13,900
Income Tax Examination, Penalties and Interest Expense	(381)	467	$ (135)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	515	896
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance of unrecognized tax benefits	31,375	32,226	28,255
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions		153
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	(321)		(683)
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	1,373	1,295	6,554
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	(1,601)	(1,516)	0
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	394	783	1,900
Ending balance of unrecognized tax benefits	30,432	31,375	32,226
Current tax expense
Federal	140,405	137,162	68,984
State	21,383	14,532	11,095
Total current tax expense	161,788	151,694	80,079
Deferred Income Tax Expense (Benefit)
Federal	(6,234)	(28,535)	50,522
State	(1,352)	3,000	4,076
Total deferred tax expense	(7,586)	(25,535)	54,598
Total income tax expense	$ 154,202	126,159	134,677
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Federal statutory rate	21.00%
Income taxes at federal statutory rates	$ 147,349	129,755	124,330
Nontaxable income on loans, leases and investments, net of nondeductible expenses	(1,523)	(1,581)	(1,639)
Excess tax benefits of compensation	1,507	1,146	1,070
State and local income taxes, including any change in valuation allowance, net of federal income tax benefit	15,825	13,850	11,985
Tax credits net of amortization	(5,078)	(5,367)	(4,474)
Repayment of claim of right income	(2,254)	(13,926)	0
Other, net	(1,624)	2,282	3,405
Total income tax expense	154,202	126,159	$ 134,677
Deferred Tax Assets, Net [Abstract]
Allowance for loan and lease losses	39,759	52,293
Operating lease liabilities	14,267	15,737
Executive separation from service agreements	7,835	8,989
Federal net operating loss carryforward	7,843	9,545
Net unrealized loss included in accumulated other comprehensive income (loss)	4,630	0
Accelerated depreciation	3,645	0
Employee compensation	18,860	16,083
Deferred Tax Assets, Other reserves	6,135	5,376
Other	5,845	6,898
Deferred tax asset	108,819	114,921
Deferred Tax Liabilities, accelerated depreciation	0	14,984
Lease financing activities	7,725	15,265
Operating lease assets	13,996	15,670
Net unrealized gain on securities included in accumulated other comprehensive income (loss)	0	24,857
Net deferred loan fees and costs	14,662	13,975
Intangible assets	14,257	13,012
Deferred Tax Liability, Security, loan and debt valuations	5,960	2,051
FDIC-assisted transactions timing differences	0	2,393
Pension assets	64,068	44,549
Other	20,998	10,193
Deferred Tax Liabilities, Gross	141,666	156,949
Net deferred tax liability	$ 32,847	$ 42,028