Consolidated Statements Of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest Income
Interest and fees on loans	$ 31,115	$ 29,640	$ 61,219	$ 58,567
Interest and dividends on investment securities:
Taxable	3,480	2,927	6,924	5,933
Tax-exempt	686	365	1,349	722
Interest on deposits in depository institutions	17	0	20
Total Interest Income	35,298	32,932	69,512	65,222
Interest Expense
Interest on deposits	3,660	3,011	7,088	5,909
Interest on short-term borrowings	187	86	344	193
Interest on long-term debt	189	167	370	331
Total Interest Expense	4,036	3,264	7,802	6,433
Net Interest Income	31,262	29,668	61,710	58,789
Provision for loan losses	510	1,122	1,191	1,661
Net Interest Income After Provision for Loan Losses	30,752	28,546	60,519	57,128
Non-Interest Income
Net gains on sale of investment securities	0	845	4,276	845
Service charges	7,074	6,564	13,805	12,867
Bankcard revenue	4,372	4,190	8,512	8,157
Trust and investment management fee income	1,612	1,371	2,998	2,647
Bank owned life insurance	968	768	2,197	1,528
Other income	895	843	1,642	1,664
Total Non-Interest Income	14,921	14,581	33,430	27,708
Non-Interest Expense
Salaries and employee benefits	12,945	12,790	26,023	25,463
Occupancy and equipment	2,956	2,708	5,794	5,544
Depreciation	1,510	1,567	3,036	3,134
FDIC insurance expense	328	512	703	977
Advertising	781	778	1,514	1,495
Bankcard expenses	970	1,016	1,913	1,954
Postage, delivery, and statement mailings	504	506	1,059	1,071
Office supplies	345	366	706	719
Legal and professional fees	440	437	889	802
Telecommunications	492	431	976	859
Repossessed asset losses, net of expenses	147	53	482	341
Other expenses	2,755	3,119	5,681	6,064
Total Non-Interest Expense	24,173	24,283	48,776	48,423
Income Before Income Taxes	21,500	18,844	45,173	36,413
Income tax expense	6,812	6,303	14,459	12,169
Net Income Available to Common Shareholders	14,688	12,541	30,714	24,244
Total Comprehensive Income	$ 16,742	$ 15,667	$ 33,641	$ 30,113
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Average common shares outstanding, basic (in shares)	15,462	14,889	15,344	14,903
Effect of dilutive securities (in shares)	25	13	25	12
Average common shares outstanding, diluted (in shares)	15,487	14,902	15,369	14,915
Earnings Per Share [Abstract]
Basic earnings per common share (in dollars per share)	$ 0.94	$ 0.83	$ 1.98	$ 1.61
Diluted earnings per common share (in dollars per share)	0.94	0.83	1.98	1.61
Dividends declared per common share (in dollars per share)	$ 0.44	$ 0.43	$ 0.88	$ 0.86