CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest and dividend income:
Loans/leases, including fees	$ 173,940	$ 173,967	$ 190,324
Securities:
Taxable	8,923	7,787	6,607
Nontaxable	16,167	14,900	13,858
Interest-bearing deposits at financial institutions	173	669	3,910
Restricted investment securities	950	1,031	1,174
Federal funds sold	2	19	203
Total interest and dividend income	200,155	198,373	216,076
Interest expense:
Deposits	13,300	23,269	50,875
Short-term borrowings	5	84	363
Federal Home Loan Bank advances	70	1,087	2,894
Other borrowings			513
Subordinated notes	6,272	4,697	3,564
Junior subordinated debentures	2,275	2,286	2,308
Total interest expense	21,922	31,423	60,517
Net interest income	178,233	166,950	155,559
Provision for credit losses	3,486	55,704	7,066
Net interest income after provision for loan/lease losses	174,747	111,246	148,493
Noninterest income:
Revenue	300,577	312,171	294,844
Gains on sales of residential real estate loans, net	4,397	4,680	2,571
Gains on sales of government guaranteed portions of loans, net	227	224	748
Swap fee income/capital markets revenue	60,992	74,821	28,295
Securities gains (losses), net	(88)	2,484	(30)
Earnings on bank-owned life insurance	1,838	1,904	1,973
Gain on sale of assets and liabilities of subsidiary			12,286
Other	6,308	4,814	5,429
Total noninterest income	100,422	113,798	78,768
Noninterest expense:
Salaries and employee benefits	100,907	96,268	92,063
Occupancy and equipment expense	15,918	16,504	15,106
Professional and data processing fees	14,579	14,644	13,381
Acquisition costs	624
Post-acquisition compensation, transition and integration costs		214	3,582
Disposition costs	13	690	3,325
FDIC insurance, other insurance and regulatory fees	4,475	4,164	2,955
Loan/lease expense	1,671	1,435	1,097
Net income from and gains/losses on operations of other real estate	(1,420)	(307)	3,789
Advertising and marketing	4,254	3,260	4,548
Bank service charges	2,173	2,016	2,009
Losses on liability extinguishment		3,907	436
Correspondent banking expense	799	838	836
Intangibles amortization	2,032	2,149	2,266
Goodwill impairment		500	3,000
Loss on sale of subsidiary		(158)
Other	7,677	5,315	6,841
Total noninterest expense	153,702	151,755	155,234
Net income before income taxes	121,467	73,289	72,027
Federal and state income tax expense	22,562	12,707	14,619
Net income	$ 98,905	$ 60,582	$ 57,408
Basic earnings per common share	$ 6.30	$ 3.84	$ 3.65
Diluted earnings per common share	$ 6.20	$ 3.80	$ 3.60
Weighted average common shares outstanding	15,708,744	15,771,650	15,730,016
Weighted average common and common equivalent shares outstanding	15,944,708	15,952,637	15,967,775
Cash dividends declared per common share	$ 0.24	$ 0.24	$ 0.24
Trust department fees
Noninterest income:
Revenue	$ 11,206	$ 9,207	$ 9,559
Investment advisory and management fees
Noninterest income:
Revenue	4,080	5,318	6,995
Deposit service fees
Noninterest income:
Revenue	6,132	6,041	6,812
Debit card fees
Noninterest income:
Revenue	4,216	3,402	3,357
Correspondent banking fees
Noninterest income:
Revenue	$ 1,114	$ 903	$ 773