Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
INTEREST AND DIVIDEND INCOME:
Interest and fees on loans	$ 157,799	$ 147,547	$ 139,867
Processing fees on PPP loans	8,737	5,140	0
Securities and cash and cash equivalents:
Taxable	11,680	12,362	12,472
Tax-exempt	1,125	1,441	2,372
Dividends	259	677	1,017
Total interest and dividend income	179,600	167,167	155,728
INTEREST EXPENSE:
Deposits	15,062	24,142	30,202
Borrowed funds and finance lease liabilities	23	4,534	5,349
Subordinated debentures (includes $276, $224, and $63 accumulated other comprehensive income reclassification for change in fair value of interest rate swap agreements, respectively)	4,735	3,780	3,979
Total interest expense	19,820	32,456	39,530
NET INTEREST INCOME	159,780	134,711	116,198
PROVISION FOR CREDIT LOSS EXPENSE	6,003	15,354	6,024
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSS EXPENSE	153,777	119,357	110,174
NON-INTEREST INCOME:
Service charges on deposit accounts	6,195	5,095	6,402
Other service charges and fees	2,436	2,548	2,930
Wealth and asset management fees	6,740	5,497	4,627
Net realized gains on available-for-sale securities (includes $783, $2,190, and $148 accumulated other comprehensive income reclassifications for net realized gains on available-for-sale securities, respectively)	783	2,190	148
Net realized gains on equity securities	0	75	16
Net unrealized gains on equity securities	790	253	1,872
Realized gains on Visa Class B shares	0	0	463
Mortgage banking	3,147	3,354	1,412
Bank owned life insurance	2,638	1,747	1,317
Card processing and interchange income	7,796	5,727	4,641
Other	2,909	1,573	2,147
Total non-interest income	33,434	28,059	25,975
NON-INTEREST EXPENSES:
Compensation and benefits (includes $(44), $0, and $23 accumulated other comprehensive income reclassifications for net amortization of actuarial (gains) losses, respectively)	61,175	48,723	46,405
Net occupancy expense	12,381	12,333	11,221
Amortization of core deposit intangible	107	206	567
Technology expense	11,723	7,153	4,994
State and local taxes	4,057	3,340	3,140
Legal, professional and examination fees	3,517	2,990	2,514
Advertising	2,081	1,993	2,113
FDIC insurance	2,509	2,414	1,252
Merger costs, prepayment penalties and branch closure costs	0	12,642	170
Dues and subscriptions	2,089	1,843	1,876
Card processing and interchange expenses	3,836	3,135	2,891
Other	12,958	10,554	10,365
Total non-interest expenses	116,433	107,326	87,508
INCOME BEFORE INCOME TAXES	70,778	40,090	48,641
INCOME TAX EXPENSE (includes $116, $413, and $13 income tax expense reclassification items, respectively)	13,071	7,347	8,560
NET INCOME	57,707	32,743	40,081
PREFERRED STOCK DIVIDENDS	4,302	1,147	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 53,405	$ 31,596	$ 40,081
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 3.16	$ 1.97	$ 2.63
Diluted (in dollars per share)	$ 3.16	$ 1.97	$ 2.63
OTHER COMPREHENSIVE INCOME (LOSS):
Net change in unrealized gains (losses) on available-for-sale securities, net of reclassification and tax	$ (16,044)	$ 8,140	$ 10,732
Change in actuarial gain, for post-employment health care plan, net of amortization and tax	275	219	428
Change in fair value of interest rate swap agreements designated as a cash flow hedge, net of interest and tax	301	(224)	(225)
Total other comprehensive income (loss)	(15,468)	8,135	10,935
COMPREHENSIVE INCOME	$ 42,239	$ 40,878	$ 51,016