Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest income
Interest and fees on loans	$ 82,951	$ 80,102	$ 79,207
Interest on interest-bearing deposits and federal funds sold	509	364	378
Interest and dividends on securities
U.S. government agencies and corporations	327	466	690
Mortgage-backed securities	1,235	1,233	1,228
Tax-exempt obligations of states and political subdivisions	3,742	4,162	4,417
Taxable obligations of states and political subdivisions	192	184	184
Corporate bonds and other	483	538	391
Total interest income	89,439	87,049	86,495
Interest expense
Savings and interest-bearing deposits	1,078	1,090	1,015
Time deposits	3,314	3,104	3,065
Borrowings	3,433	3,338	3,485
Trust preferred capital notes	1,143	1,162	960
Total interest expense	8,968	8,694	8,525
Net interest income	80,471	78,355	77,970
Provision for loan losses	18,040	15,512	16,330
Net interest income after provision for loan losses	62,431	62,843	61,640
Noninterest income
Gains on sales of loans	8,120	6,336	5,086
Service charges on deposit accounts	4,262	4,322	4,468
Other service charges and fees	8,553	6,787	6,246
Net gains on calls and sales of available for sale securities	52	29	29
Investment services income	1,165	1,481	1,229
Other	3,475	1,759	2,347
Total noninterest income	25,627	20,714	19,405
Noninterest expenses
Salaries and employee benefits	41,925	38,926	36,310
Occupancy	9,660	8,828	8,806
Other	18,555	18,420	18,441
Total noninterest expenses	70,140	66,174	63,557
Income before income taxes	17,918	17,383	17,488
Income tax expense	4,459	4,853	5,144
Net income	$ 13,459	$ 12,530	$ 12,344
Net income per share - basic (in dollars per share)	$ 3.90	$ 3.68	$ 3.63
Net income – assuming dilution (in Dollars per share)	$ 3.89	$ 3.68	$ 3.59
Weighted average number of shares - basic (in shares)	3,454,282	3,401,426	3,404,112
Weighted average number of shares - assuming dilution (in shares)	3,455,883	3,401,834	3,436,278