Loans and Allowance for Loan Losses (Details 7) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Summary of activity related to our allowance for loan losses
Balance, beginning of period			$ 11,752	$ 10,213
Provision for loan losses	$ 875	$ 1,325	2,500	3,275
Loan charge-offs			(1,040)	(2,303)
Loan recoveries			156	120
Net loan charge-offs			(884)	(2,183)
Balance, end of period	13,368	11,305	$ 13,368	$ 11,305
Net charge-offs to average loans (annualized)			0.13%	0.37%
Allowance for loan losses to gross loans			1.35%	1.36%
Allowance for loan losses to nonperforming loans			186.05%	141.99%
Commercial [Member] | Owner occupied RE [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period			$ 1,645	$ 1,880
Provision for loan losses			816	$ (138)
Loan charge-offs			$ (24)
Loan recoveries
Net loan charge-offs			$ (24)
Balance, end of period	2,437	1,742	2,437	$ 1,742
Commercial [Member] | Non-owner occupied RE [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period			2,332	2,633
Provision for loan losses			797	1,271
Loan charge-offs			(204)	(1,580)
Loan recoveries			8	1
Net loan charge-offs			(196)	(1,579)
Balance, end of period	2,933	2,325	2,933	2,325
Commercial [Member] | Construction [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period			614	397
Provision for loan losses			$ (304)	$ 150
Loan charge-offs
Loan recoveries
Net loan charge-offs
Balance, end of period	310	547	$ 310	$ 547
Commercial [Member] | Business [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period			3,625	3,329
Provision for loan losses			653	439
Loan charge-offs			(621)	(635)
Loan recoveries			102	114
Net loan charge-offs			(519)	(521)
Balance, end of period	3,759	3,247	3,759	3,247
Consumer [Member] | Real estate [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period			1,714	1,091
Provision for loan losses			439	$ 821
Loan charge-offs			$ (173)
Loan recoveries
Net loan charge-offs			$ (173)
Balance, end of period	1,980	1,912	1,980	$ 1,912
Consumer [Member] | Home equity [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period			1,162	644
Provision for loan losses			75	560
Loan charge-offs			(13)	(77)
Loan recoveries			46	5
Net loan charge-offs			33	(72)
Balance, end of period	1,270	1,132	1,270	1,132
Consumer [Member] | Construction [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period			236	99
Provision for loan losses			$ 57	$ 102
Loan charge-offs
Loan recoveries
Net loan charge-offs
Balance, end of period	293	201	$ 293	$ 201
Consumer [Member] | Other [Member]
Summary of activity related to our allowance for loan losses
Balance, beginning of period			424	140
Provision for loan losses			(33)	70
Loan charge-offs			$ (5)	$ (11)
Loan recoveries
Net loan charge-offs			$ (5)	$ (11)
Balance, end of period	$ 386	$ 199	$ 386	$ 199