Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest Income
Interest and fees on loans	$ 41,335	$ 42,279
Interest and dividends on investment securities:
Taxable	5,871	5,689
Tax-exempt	707	779
Interest on deposits in depository institutions	304	186
Total Interest Income	48,217	48,933
Interest Expense
Interest on deposits	7,238	7,767
Interest on short-term borrowings	464	1,052
Interest on long-term debt	100	48
Total Interest Expense	7,802	8,867
Net Interest Income	40,415	40,066
Provision for (recovery of) credit losses	7,972	(849)
Net Interest Income After Provision for (Recovery of) Credit Losses	32,443	40,915
Non-Interest Income
Gains on sale of investment securities, net	63	88
Unrealized (losses) gains recognized on equity securities still held	(2,402)	75
Bank owned  life insurance	1,676	1,016
Sale of VISA shares	17,837	0
Other income	1,536	814
Total Non-Interest Income	33,347	15,925
Non-Interest Expense
Salaries and employee benefits	15,851	15,243
Occupancy related expense	2,488	2,732
Equipment and software related expense	2,429	2,191
FDIC insurance expense	0	291
Advertising	843	869
Bankcard expenses	1,435	1,182
Postage, delivery, and statement mailings	616	624
Office supplies	394	386
Legal and professional fees	601	521
Telecommunications	511	726
Gains (Losses) on Sales of Other Real Estate	198	216
Merger related costs	0	250
Other expenses	4,102	4,180
Total Non-Interest Expense	29,468	29,411
Income Before Income Taxes	36,322	27,429
Income tax expense	7,322	5,810
Net Income Available to Common Shareholders	$ 29,000	$ 21,619
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Average common shares outstanding, basic (in shares)	16,080	16,411
Effect of dilutive securities (in shares)	21	18
Average common shares outstanding, diluted (in shares)	16,101	16,429
Earnings Per Share [Abstract]
Basic earnings per common share (in dollars per share)	$ 1.79	$ 1.31
Diluted earnings per common share (in dollars per share)	$ 1.78	$ 1.30
Service charges
Non-Interest Income
Revenue from contract with customer	$ 7,723	$ 7,321
Bankcard revenue
Non-Interest Income
Revenue from contract with customer	5,115	4,969
Trust and investment management fee income
Non-Interest Income
Revenue from contract with customer	$ 1,799	$ 1,642