Loans and Allowance for Credit Losses (Details 7) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	$ 722,171	$ 688,156
Total past due	4,850	9,124
Non-accrual	14,009	13,466
Total loans	$ 741,030	$ 710,746
Percent of total loans, Current	97.50%	96.80%
Percent of total loans, Total past due	0.60%	1.30%
Percent of total loans, Non accrual	1.90%	1.90%
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	$ 3,046	$ 5,654
Percent of total loans, Total past due	0.40%	0.80%
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	$ 1,769	$ 3,383
Percent of total loans, Total past due	0.20%	0.50%
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	$ 35	$ 87
Percent of total loans, Total past due	0.00%	0.00%
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	$ 72,440	$ 61,325
Total past due	0	1,786
Non-accrual	8,275	6,046
Total loans	80,715	69,157
Construction [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	0	1,786
Construction [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	0	0
Construction [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	0	0
Residential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	271,659	263,165
Total past due	4,173	6,136
Non-accrual	2,766	4,035
Total loans	278,598	273,336
Residential real estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	2,874	3,351
Residential real estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	1,264	2,702
Residential real estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	35	83
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	313,958	301,695
Total past due	505	972
Non-accrual	2,668	3,121
Total loans	317,131	305,788
Commercial real estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	0	459
Commercial real estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	505	513
Commercial real estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	0	0
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	57,019	52,352
Total past due	104	178
Non-accrual	177	141
Total loans	57,300	52,671
Commercial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	104	47
Commercial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	0	131
Commercial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	0	0
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	7,095	9,619
Total past due	68	52
Non-accrual	123	123
Total loans	7,286	9,794
Consumer [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	68	11
Consumer [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	0	37
Consumer [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	$ 0	$ 4