Fair Value - Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Carrying Value
Financial assets
Cash and cash equivalents	$ 27,024	$ 27,655
Securities	160,582	171,440
Restricted securities	10,027	9,116
Loans held for sale	187	735
Net loans	648,829	624,956
Accrued interest receivable	2,279	3,012
Financial liabilities
Deposits	716,424	718,504
Federal funds purchased and securities sold under agreements to repurchase	10,605	18,730
Federal Home Loan Bank advances	75,000	76,000
Notes payable		0
Subordinated debentures	20,620	20,620
Series B mandatorily redeemable preferred stock	209	268
Accrued interest payable	253	235
Fair value measurements
Financial assets
Cash and cash equivalents	27,024	27,655
Securities	160,582	171,440
Loans held for sale	193	760
Net loans	655,336	629,017
Accrued interest receivable	2,279	3,012
Financial liabilities
Deposits	716,732	718,689
Federal funds purchased and securities sold under agreements to repurchase	10,605	18,730
Federal Home Loan Bank advances	75,475	76,271
Notes payable		0
Subordinated debentures	15,671	13,933
Series B mandatorily redeemable preferred stock	210	273
Accrued interest payable	253	235
Fair value measurements | Level 1
Financial assets
Cash and cash equivalents	27,024	27,655
Securities	0	0
Restricted securities	0	0
Loans held for sale	0	0
Net loans	0	0
Accrued interest receivable	0	0
Financial liabilities
Deposits	0	0
Federal funds purchased and securities sold under agreements to repurchase	0	0
Federal Home Loan Bank advances	0	0
Notes payable		0
Subordinated debentures	0	0
Series B mandatorily redeemable preferred stock	0	0
Accrued interest payable	0	0
Fair value measurements | Level 2
Financial assets
Cash and cash equivalents	0	0
Securities	155,566	166,419
Restricted securities	0	0
Loans held for sale	193	760
Net loans	0	0
Accrued interest receivable	428	402
Financial liabilities
Deposits	716,732	718,689
Federal funds purchased and securities sold under agreements to repurchase	10,605	18,730
Federal Home Loan Bank advances	75,475	76,271
Notes payable		0
Subordinated debentures	0	0
Series B mandatorily redeemable preferred stock	210	273
Accrued interest payable	237	169
Fair value measurements | Level 3
Financial assets
Cash and cash equivalents	0	0
Securities	5,016	5,021
Restricted securities	0	0
Loans held for sale	0	0
Net loans	655,336	629,017
Accrued interest receivable	1,851	2,610
Financial liabilities
Deposits	0	0
Federal funds purchased and securities sold under agreements to repurchase	0	0
Federal Home Loan Bank advances	0	0
Notes payable		0
Subordinated debentures	15,671	13,933
Series B mandatorily redeemable preferred stock	0	0
Accrued interest payable	$ 16	$ 66