Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest and dividend income:
Loans including fees	$ 152,687	$ 139,867	$ 118,193
Securities and cash and cash equivalents:
Taxable	12,362	12,472	9,921
Tax-exempt	1,441	2,372	2,739
Dividends	677	1,017	1,017
Total interest and dividend income	167,167	155,728	131,870
Interest Expense:
Deposits	24,142	30,202	17,228
Borrowed funds	4,534	5,349	5,856
Subordinated debentures (includes $224, $63, and $164 accumulated other comprehensive income reclassification for change in fair value of interest rate swap agreements in 2020, 2019, and 2018, respectively)	3,780	3,979	3,866
Total interest expense	32,456	39,530	26,950
Net Interest Income	134,711	116,198	104,920
Provision for credit loss expense	15,354	6,024	6,072
Net interest income after provision for credit loss expense	119,357	110,174	98,848
Non-interest income:
Service charges on deposit accounts	5,095	6,402	5,759
Other service charges and fees	2,548	2,930	2,833
Wealth and asset management fees	5,497	4,627	4,172
Net realized gains on available-for-sale securities (includes $2,190, $148, and $0 accumulated other comprehensive income reclassifications for net realized gains on available-for-sale securities in 2020, 2019, and 2018, respectively)	2,190	148	0
Net realized gains on trading securities	75	16	151
Net unrealized gains (losses) on trading securities	253	1,872	(602)
Realized gains on Visa Class B shares	0	463	0
Mortgage banking	3,354	1,412	1,019
Bank owned life insurance	1,747	1,317	1,408
Card processing and interchange income	5,727	4,641	4,261
Other	1,573	2,147	1,722
Total non-interest income	28,059	25,975	20,723
Non-Interest Expenses:
Salaries	36,519	35,212	31,323
Employee benefits (includes $0, $23, and $84 accumulated other comprehensive income reclassifications for net amortization of actuarial losses in 2020, 2019, and 2018, respectively)	12,204	11,193	10,533
Net occupancy expense	12,333	11,221	10,281
Amortization of core deposit intangible	206	567	898
Data processing	5,759	4,994	4,586
State and local taxes	3,340	3,140	3,441
Legal, professional and examination fees	2,990	2,514	1,851
Advertising	1,993	2,113	2,345
FDIC insurance	2,414	1,252	1,396
Directors fees and benefits	538	1,352	885
Merger costs, prepayment penalties and branch closure costs	12,642	170	0
Dues and subscriptions	2,777	1,876	1,319
Card processing and interchange expenses	3,135	2,891	2,834
Other	10,476	9,013	7,650
Total non-interest expenses	107,326	87,508	79,342
Income before income taxes	40,090	48,641	40,229
Income tax expense (includes $413, $13, and $(52) income tax expense reclassification items in 2020, 2019, and 2018, respectively)	7,347	8,560	6,510
Net Income	32,743	40,081	33,719
Preferred stock dividends	1,147	0	0
Net income available to common stockholders	$ 31,596	$ 40,081	$ 33,719
Earnings Per Share:
Basic (in dollars per share)	$ 1.97	$ 2.63	$ 2.21
Diluted (in dollars per share)	$ 1.97	$ 2.63	$ 2.21
Other comprehensive income (loss):
Net change in unrealized gains (losses) on available-for-sale securities, net of reclassification and tax	$ 8,140	$ 10,732	$ (4,007)
Change in actuarial gain (loss), for post-employment health care plan, net of amortization and tax	219	428	386
Change in fair value of interest rate swap agreements designated as a cash flow hedge, net of interest and tax	(224)	(225)	(32)
Total other comprehensive income (loss)	8,135	10,935	(3,653)
Comprehensive Income	$ 40,878	$ 51,016	$ 30,066