Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest Income
Interest and fees on loans	$ 37,718	$ 43,174	$ 79,053	$ 85,453
Interest and dividends on investment securities:
Taxable	5,718	5,732	11,589	11,421
Tax-exempt	821	755	1,528	1,534
Interest on deposits in depository institutions	55	577	360	763
Total Interest Income	44,312	50,238	92,530	99,171
Interest Expense
Interest on deposits	5,963	8,417	13,201	16,184
Interest on short-term borrowings	279	863	743	1,915
Interest on long-term debt	0	47	100	95
Total Interest Expense	6,242	9,327	14,044	18,194
Net Interest Income	38,070	40,911	78,486	80,977
Provision for (recovery of) credit losses	1,250	(600)	9,222	(1,449)
Net Interest Income After Provision for (Recovery of) Credit Losses	36,820	41,511	69,264	82,426
Non-Interest Income
(Losses) gains on sale of investment securities, net	(6)	21	56	109
Unrealized gains (losses) recognized on equity securities still held	242	113	(2,159)	188
Bank owned  life insurance	848	1,132	2,523	2,148
Sale of VISA shares	0	0	17,837	0
Other income	783	1,560	2,318	2,374
Total Non-Interest Income	14,631	17,825	47,975	33,750
Non-Interest Expense
Salaries and employee benefits	14,873	15,767	30,724	31,010
Occupancy related expense	2,402	2,598	4,890	5,330
Equipment and software related expense	2,504	2,223	4,933	4,414
FDIC insurance expense	167	347	167	638
Advertising	933	920	1,776	1,789
Bankcard expenses	1,498	1,534	2,933	2,716
Postage, delivery, and statement mailings	592	545	1,208	1,169
Office supplies	353	399	747	785
Legal and professional fees	589	605	1,190	1,126
Telecommunications	531	597	1,042	1,323
Repossessed asset losses, net of expenses	76	253	274	469
Merger related costs	0	547	0	797
Other expenses	3,950	4,437	8,052	8,617
Total Non-Interest Expense	28,468	30,772	57,936	60,183
Income Before Income Taxes	22,983	28,564	59,303	55,993
Income tax expense	4,732	5,813	12,054	11,623
Net Income Available to Common Shareholders	$ 18,251	$ 22,751	$ 47,249	$ 44,370
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Average common shares outstanding, basic (in shares)	16,081	16,368	16,123	16,390
Effect of dilutive securities (in shares)	16	18	19	18
Average common shares outstanding, diluted (in shares)	16,097	16,386	16,142	16,408
Earnings Per Share [Abstract]
Basic earnings per common share (in dollars per share)	$ 1.12	$ 1.38	$ 2.90	$ 2.68
Diluted earnings per common share (in dollars per share)	$ 1.12	$ 1.38	$ 2.90	$ 2.68
Service charges
Non-Interest Income
Revenue from contract with customer	$ 4,945	$ 7,778	$ 12,667	$ 15,099
Bankcard revenue
Non-Interest Income
Revenue from contract with customer	5,888	5,522	11,003	10,491
Trust and investment management fee income
Non-Interest Income
Revenue from contract with customer	$ 1,931	$ 1,699	$ 3,730	$ 3,341