Fair Value - Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Carrying Value
Financial assets
Cash and cash equivalents	$ 44,745	$ 27,655
Securities	183,646	171,440
Restricted securities	10,098	9,116
Loans held for sale	0	735
Net loans	657,774	624,956
Accrued interest receivable	2,275	3,012
Financial liabilities
Deposits	760,951	718,504
Federal funds purchased and securities sold under agreements to repurchase	13,093	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	241	235
Fair value measurements
Financial assets
Cash and cash equivalents	44,745	27,655
Securities	183,646	171,440
Loans held for sale	0	760
Net loans	663,761	629,017
Accrued interest receivable	2,275	3,012
Financial liabilities
Deposits	761,198	718,689
Federal funds purchased and securities sold under agreements to repurchase	13,093	18,730
Federal Home Loan Bank advances	75,397	76,271
Notes payable		0
Subordinated debentures	16,511	13,933
Series B mandatorily redeemable preferred stock	211	273
Accrued interest payable	241	235
Fair value measurements | Level 1
Financial assets
Cash and cash equivalents	44,745	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	178,628	166,419
Restricted securities	0	0
Loans held for sale	0	760
Net loans	0	0
Accrued interest receivable	684	402
Financial liabilities
Deposits	761,198	718,689
Federal funds purchased and securities sold under agreements to repurchase	13,093	18,730
Federal Home Loan Bank advances	75,397	76,271
Notes payable		0
Subordinated debentures	0	0
Series B mandatorily redeemable preferred stock	211	273
Accrued interest payable	168	169
Fair value measurements | Level 3
Financial assets
Cash and cash equivalents	0	0
Securities	5,018	5,021
Restricted securities	0	0
Loans held for sale	0	0
Net loans	663,761	629,017
Accrued interest receivable	1,591	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	16,511	13,933
Series B mandatorily redeemable preferred stock	0	0
Accrued interest payable	$ 73	$ 66