Loans and Allowance for Loan Losses (Details 1) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	$ 204,412	$ 203,121
Total gross loans, net of deferred fees, After one but within five years	432,734	371,209
Total gross loans, net of deferred fees, After five years	326,350	297,116
Total gross loans, net of deferred fees	963,496	871,446
Loans maturing after one year with fixed interest rates	560,046	494,058
Loans maturing after one year with floating interest rates	199,038	174,267
Commercial [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	147,480	155,096
Total gross loans, net of deferred fees, After one but within five years	350,363	293,556
Total gross loans, net of deferred fees, After five years	138,364	126,830
Total gross loans, net of deferred fees	636,207	575,482
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	22,954	20,737
Total gross loans, net of deferred fees, After one but within five years	125,545	98,110
Total gross loans, net of deferred fees, After five years	84,498	72,214
Total gross loans, net of deferred fees	232,997	191,061
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	38,321	46,718
Total gross loans, net of deferred fees, After one but within five years	132,549	104,402
Total gross loans, net of deferred fees, After five years	36,753	32,320
Total gross loans, net of deferred fees	207,623	183,440
Commercial [Member] | Construction [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	13,429	11,923
Total gross loans, net of deferred fees, After one but within five years	15,467	25,145
Total gross loans, net of deferred fees, After five years	4,674	13,927
Total gross loans, net of deferred fees	33,570	50,995
Commercial [Member] | Business [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	72,776	75,718
Total gross loans, net of deferred fees, After one but within five years	76,802	65,899
Total gross loans, net of deferred fees, After five years	12,439	8,369
Total gross loans, net of deferred fees	162,017	149,986
Consumer [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	56,932	48,025
Total gross loans, net of deferred fees, After one but within five years	82,371	77,653
Total gross loans, net of deferred fees, After five years	187,986	170,286
Total gross loans, net of deferred fees	327,289	295,964
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	25,794	21,571
Total gross loans, net of deferred fees, After one but within five years	42,669	41,549
Total gross loans, net of deferred fees, After five years	97,941	83,739
Total gross loans, net of deferred fees	166,404	146,859
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	6,151	5,645
Total gross loans, net of deferred fees, After one but within five years	31,292	28,394
Total gross loans, net of deferred fees, After five years	67,798	61,590
Total gross loans, net of deferred fees	105,241	95,629
Consumer [Member] | Construction [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	17,578	13,531
Total gross loans, net of deferred fees, After one but within five years	2,623	2,073
Total gross loans, net of deferred fees, After five years	20,756	23,622
Total gross loans, net of deferred fees	40,957	39,226
Consumer [Member] | Other [Member]
Loan maturity distribution by type and related interest rate
Total gross loans, net of deferred fees, One year or less	7,409	7,278
Total gross loans, net of deferred fees, After one but within five years	5,787	5,637
Total gross loans, net of deferred fees, After five years	1,491	1,335
Total gross loans, net of deferred fees	$ 14,687	$ 14,250