Loans and Allowance for Loan Losses (Details 1) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	$ 186,379	$ 185,625
Total gross loans, net of deferred fees, After one but within five years	499,670	485,298
Total gross loans, net of deferred fees, After five years	532,631	492,721
Total gross loans, net of deferred fees	1,218,680	1,163,644
Loans maturing after one year with: fixed interest rates	778,861	733,892
Loans maturing after one year with: floating interest rates	253,440	244,127
Commercial [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	127,872	132,989
Total gross loans, net of deferred fees, After one but within five years	407,574	396,493
Total gross loans, net of deferred fees, After five years	256,782	231,975
Total gross loans, net of deferred fees	792,228	761,457
Commercial [Member] \| Owner occupied RE [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	22,336	26,062
Total gross loans, net of deferred fees, After one but within five years	149,371	145,419
Total gross loans, net of deferred fees, After five years	116,593	114,457
Total gross loans, net of deferred fees	288,300	285,938
Commercial [Member] \| Non-owner occupied RE [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	33,669	34,685
Total gross loans, net of deferred fees, After one but within five years	140,116	142,261
Total gross loans, net of deferred fees, After five years	84,664	62,628
Total gross loans, net of deferred fees	258,449	239,574
Commercial [Member] \| Construction [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	9,077	5,881
Total gross loans, net of deferred fees, After one but within five years	11,358	9,558
Total gross loans, net of deferred fees, After five years	16,454	17,954
Total gross loans, net of deferred fees	36,889	33,393
Commercial [Member] \| Business [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	62,790	66,361
Total gross loans, net of deferred fees, After one but within five years	106,729	99,255
Total gross loans, net of deferred fees, After five years	39,071	36,936
Total gross loans, net of deferred fees	208,590	202,552
Consumer [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	58,507	52,636
Total gross loans, net of deferred fees, After one but within five years	92,096	88,805
Total gross loans, net of deferred fees, After five years	275,849	260,746
Total gross loans, net of deferred fees	426,452	402,187
Consumer [Member] \| Real estate [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	28,754	26,342
Total gross loans, net of deferred fees, After one but within five years	52,367	49,832
Total gross loans, net of deferred fees, After five years	149,574	139,414
Total gross loans, net of deferred fees	230,695	215,588
Consumer [Member] \| Home equity [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	7,391	7,142
Total gross loans, net of deferred fees, After one but within five years	29,494	29,041
Total gross loans, net of deferred fees, After five years	106,788	100,922
Total gross loans, net of deferred fees	143,673	137,105
Consumer [Member] \| Construction [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	15,762	14,103
Total gross loans, net of deferred fees, After one but within five years	606	627
Total gross loans, net of deferred fees, After five years	15,167	17,192
Total gross loans, net of deferred fees	31,535	31,922
Consumer [Member] \| Other [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	6,600	5,049
Total gross loans, net of deferred fees, After one but within five years	9,629	9,305
Total gross loans, net of deferred fees, After five years	4,320	3,218
Total gross loans, net of deferred fees	$ 20,549	$ 17,572

Loans and Allowance for Loan Losses (Details 1) - USD ($)
$ in Thousands

Mar. 31, 2017

Dec. 31, 2016

Loan maturity distribution by type and related interest rate

Total gross loans, net of deferred fees, One year or less

$ 186,379

$ 185,625

Total gross loans, net of deferred fees, After one but within five years

499,670

485,298

Total gross loans, net of deferred fees, After five years

532,631