Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest income:
Loans	$ 77,694	$ 70,564	$ 69,863
Mortgage-backed securities	6,051	6,845	7,403
Investment securities and other	2,118	2,444	2,891
Total interest income	85,863	79,853	80,157
Interest expense:
Deposits (note 9)	4,301	4,103	4,709
Borrowed funds (note 10)	4,733	3,402	4,919
Total interest expense	9,034	7,505	9,628
Net interest income	76,829	72,348	70,529
Provision for loan losses (note 5)	1,275	2,630	2,800
Net interest income after provision for loan losses	75,554	69,718	67,729
Other income:
Bankcard services revenue	3,537	3,478	3,584
Wealth management revenue	2,187	2,280	2,174
Fees and services charges	8,124	8,589	7,451
Loan servicing income (note 6)	268	816	748
Net gain on sale of loan servicing	111	408
Net gain on sales of loans available-for-sale (note 15)	822	772	1,163
Net gain on sales of investment securities available-for-sale (note 4)		1,031	46
Net loss from other real estate operations	(149)	(390)	(161)
Income from Bank Owned Life Insurance	1,501	1,477	1,404
Other	25	116	49
Total other income	16,426	18,577	16,458
Operating expenses:
Compensation and employee benefits (notes 12 and 13)	31,946	31,427	28,762
Occupancy (note 14)	5,722	5,510	5,562
Equipment	3,725	3,278	2,724
Marketing	1,516	1,795	1,632
Federal deposit insurance	2,072	2,128	2,141
Data processing	4,731	4,239	3,996
Check card processing	1,815	1,934	1,768
Professional fees	1,865	2,267	2,449
Other operating expense	5,484	5,186	5,366
Amortization of core deposit intangible	21
Federal Home Loan Bank advance prepayment fee (note 10)			4,265
Branch consolidation expense			579
Merger related expenses	1,878
Total operating expenses	60,775	57,764	59,244
Income before provision for income taxes	31,205	30,531	24,943
Provision for income taxes (note 11)	10,883	10,611	8,613
Net income	$ 20,322	$ 19,920	$ 16,330
Basic earnings per share	$ 1.22	$ 1.19	$ 0.96
Diluted earnings per share	$ 1.21	$ 1.19	$ 0.95
Average basic shares outstanding (note 16)	16,600	16,687	17,071
Average diluted shares outstanding (note 16)	16,811	16,797	17,157