Loans and Allowance for Loan Losses - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Unpaid Principal Balance
With no related allowance recorded	$ 1,361		$ 1,361		$ 1,404
With an allowance recorded	1,124		1,124		1,623
Total	2,485		2,485		3,027
Recorded Investment
With no related allowance recorded	1,361		1,361		1,404
With an allowance recorded	1,124		1,124		1,623
Total	2,485		2,485		3,027
Allowance for Loan Losses Allocated
Total	256		256		433
Average Recorded Investment
Total	2,491	$ 4,834	2,510	$ 4,924
Interest Income Recognized
Total	32	53	64	105
Cash Basis Interest Recognized
Total	32	44	63	95
Commercial | Commercial
Unpaid Principal Balance
With no related allowance recorded	58		58		61
With an allowance recorded	75		75		84
Recorded Investment
With no related allowance recorded	58		58		61
With an allowance recorded	75		75		84
Allowance for Loan Losses Allocated
Total	35		35		36
Average Recorded Investment
Total	135	1,893	139	1,972
Interest Income Recognized
Total	3	24	6	49
Cash Basis Interest Recognized
Total	3	22	6	45
Real estate | Residential Real Estate
Unpaid Principal Balance
With no related allowance recorded	692		692		700
With an allowance recorded	52		52		107
Recorded Investment
With no related allowance recorded	692		692		700
With an allowance recorded	52		52		107
Allowance for Loan Losses Allocated
Total	25		25		20
Average Recorded Investment
Total	747	1,014	749	1,019
Interest Income Recognized
Total	8	12	16	25
Cash Basis Interest Recognized
Total	8	9	15	18
Other | Commercial Real Estate
Unpaid Principal Balance
With no related allowance recorded	611		611		643
With an allowance recorded	969		969		1,423
Recorded Investment
With no related allowance recorded	611		611		643
With an allowance recorded	969		969		1,423
Allowance for Loan Losses Allocated
Total	195		195		377
Average Recorded Investment
Total	1,584	1,916	1,604	1,922
Interest Income Recognized
Total	21	17	41	31
Cash Basis Interest Recognized
Total	21	13	41	32
Other | Consumer
Unpaid Principal Balance
With an allowance recorded	28		28
Recorded Investment
With an allowance recorded	28		28		$ 9
Allowance for Loan Losses Allocated
Total	1		1
Average Recorded Investment
Total	$ 25	$ 11	18	$ 11
Interest Income Recognized
Total			1
Cash Basis Interest Recognized
Total			$ 1