Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest Income
Loans	$ 73,346	$ 68,682	$ 68,077
Investment securities:
Taxable	3,598	3,507	2,695
Tax-exempt	3,171	3,068	2,901
Interest-bearing deposits	169	349	282
FHLB stock dividends	552	642	826
Total interest income	80,836	76,248	74,781
Interest Expense
Deposits	5,341	5,283	5,913
Federal Home Loan Bank advances and other	675	528	434
Subordinated debentures	613	587	601
Securities sold under agreement to repurchase	152	161	222
Total interest expense	6,781	6,559	7,170
Net interest income	74,055	69,689	67,611
Provision for loan losses	136	1,117	1,824
Net interest income after provision for loan losses	73,919	68,572	65,787
Noninterest Income
Service fees and other charges	10,752	10,258	10,045
Mortgage banking income	6,713	5,602	8,443
Insurance commissions	10,076	9,859	9,627
Gain on sale of non-mortgage loans	824	181	101
Gain (loss) on sale or call of securities	22	932	97
Other-than-temporary impairment (OTTI) losses on investment securities
Total gains (impairment losses) on investment securities	0	0	(337)
Losses recognized in other comprehensive income	0	0	0
Net impairment loss recognized in earnings	0	0	(337)
Trust income	1,462	1,240	969
Income from bank owned life insurance	895	1,802	883
Other noninterest income	1,059	1,767	950
Total noninterest income	31,803	31,641	30,778
Noninterest Expense
Compensation and benefits	37,769	35,543	34,301
Occupancy	7,197	6,683	6,675
FDIC insurance	1,324	1,419	1,616
Data processing	6,083	5,856	5,125
Other noninterest expense	15,516	17,257	17,335
Total noninterest expense	67,889	66,758	65,052
Income before income taxes	37,833	33,455	31,513
Federal income taxes	11,410	9,163	9,278
Net Income	$ 26,423	$ 24,292	$ 22,235
Earnings per common share:
Basic (in dollars per share)	$ 2.87	$ 2.55	$ 2.28
Diluted (in dollars per share)	2.82	2.44	2.19
Dividends declared per common share (in dollars per share)	$ 0.78	$ 0.63	$ 0.4