Consolidated Statements of Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest income:
Loans, including fees		$ 52,556	$ 47,440	$ 44,992
Investment securities:
Taxable securities		4,363	4,938	5,173
Tax-exempt securities		3,147	2,878	2,457
Federal funds sold		81	45	119
Total interest income		60,147	55,301	52,741
Interest expense:
Deposits		2,185	2,426	3,413
Federal funds purchased and securities sold under agreements to repurchase		9	11	85
Short-term borrowings		37	40	4
Subordinated notes		705	754	711
Federal Home Loan Bank advances		2,825	2,628	2,657
Long-term debt		232	297	188
Total interest expense		5,993	6,156	7,058
Net interest income		54,154	49,145	45,683
Provision for loan losses	[1]	850	750	(850)
Net interest income after provision for loan losses		53,304	48,395	46,533
Noninterest income:
Service charges on deposit accounts		2,609	2,790	2,923
Debit card usage fees		1,830	1,764	1,787
Trust services		1,286	1,327	997
Revenue from residential mortgage banking		163	1,394	1,275
Increase in cash value of bank-owned life insurance		727	731	646
Gains (loss) on disposition of premises and equipment		(6)	1,069	(9)
Realized investment securities gains (losses), net		47	223	0
Other income		1,547	998	875
Total noninterest income		8,203	10,296	8,494
Noninterest expense:
Salaries and employee benefits		16,065	16,086	15,757
Occupancy		4,105	4,165	3,906
Data processing		2,329	2,241	2,030
FDIC insurance expense		839	757	733
Other real estate owned expense		10	1,865	1,359
Professional fees		748	944	1,200
Director fees		881	714	584
Miscellaneous losses		30	329	736
Other expenses		5,061	4,901	4,511
Total noninterest expense		30,068	32,002	30,816
Income before income taxes		31,439	26,689	24,211
Income taxes		9,697	6,649	7,320
Net income		$ 21,742	$ 20,040	$ 16,891
Basic earnings per common share		$ 1.35	$ 1.25	$ 1.02
Diluted earnings per common share		$ 1.35	$ 1.25	$ 1.02

[1] The negative provisions for the various segments are either related to the decline in outstanding balances in each of those portfolio segments during the time periods disclosed and/or improvement in the credit quality factors related to those portfolio segments.