Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Contingency [Line Items]
Current Federal Tax Expense (Benefit)	$ 60,771	$ 50,708	$ 44,094
Current State and Local Tax Expense (Benefit)	12,811	9,610	7,822
Current tax (benefit) expense	73,582	60,318	51,916
Deferred Federal Income Tax Expense (Benefit)	(5,156)	(5,445)	(12,078)
Deferred State and Local Income Tax Expense (Benefit)	(957)	(1,184)	(1,690)
Deferred tax expense (benefit)	(6,113)	(6,629)	(13,768)
Income tax provision	67,469	53,689	38,148
Deferred tax assets:
Allowance for credit losses	40,054	39,378
Deferred Tax Assets, Lease Liability	14,088	15,973
Deferred compensation	13,619	14,887
Stock option and restricted stock	3,751	3,186
OREO	0	50
Nonaccrual interest	120	118
Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross	164,697	0
Deferred Tax Assets, Net operating losses and credit carryforwards	2,404	2,898
Other	(3,134)	(1,824)
Total deferred tax assets	241,867	78,314
Deferred tax liabilities:
Asset purchase tax basis difference	(4,083)	(5,052)
Deferred Tax Liabilities, Leasing Arrangements	(12,792)	(14,510)
FHLB stock dividends	(810)	(810)
Deferred loan fees	(6,205)	(5,957)
deferred tax liabilities, unrealized gains on available-for-sale securities	0	7,254
deferred tax liabilites, unrealized gains on equity securities	(3,231)	(3,231)
Deferred tax liabilities, purchase accounting	(11,106)	(14,211)
Depreciation	(3,112)	(3,304)
Deferred Tax Liabilities, Derivatives	(2,767)	(5,280)
Deferred Tax Liabilities, Other	(144)	(130)
Total deferred tax liabilities	44,250	59,739
Net deferred tax asset	197,617	18,575
Reconciliation of effective income tax rate with federal statutory tax rate
Income tax based on statutory rate	$ 66,706	$ 53,867	$ 40,402
Income tax based on statutory rate, percent	21.00%	21.00%	21.00%
Tax exempt instruments	$ (6,864)	$ (6,306)	$ (5,987)
Tax exempt instrument, percent	(2.00%)	(2.00%)	(3.00%)
Bank owned life insurance proceeds	$ (1,806)	$ (1,444)	$ (1,348)
Life insurance proceeds, percent	(1.00%)	(1.00%)	(1.00%)
State income tax, net of federal benefit	$ 9,364	$ 7,892	$ 4,844
State income tax, net of federal benefit, Percent	3.00%	3.00%	3.00%
Other, net	$ 69	$ (320)	$ 237
Other, net, percent	0.00%	0.00%	0.00%
Income tax provision	$ 67,469	$ 53,689	$ 38,148
Income tax provision (benefit), percent	21.00%	21.00%	20.00%