Loans and Allowance for Loan Losses (Details 8) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	$ 12,455	$ 15,036	$ 14,548
Recognized interest income	126	113	416
Commercial [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	10,884	12,761	12,976
Recognized interest income	115	98	356
Commercial [Member] | Owner occupied RE [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	615	1,101	884
Recognized interest income	7	22	6
Commercial [Member] | Non-owner occupied RE [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	5,731	4,915	6,137
Recognized interest income	48	22	128
Commercial [Member] | Construction [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	1,778	2,332	1,888
Recognized interest income	30	18	74
Commercial [Member] | Business [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	2,760	4,413	4,067
Recognized interest income	30	36	148
Consumer [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	1,571	2,275	1,572
Recognized interest income	11	15	60
Consumer [Member] | Real estate [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	1,119	1,663	1,112
Recognized interest income	9	11	46
Consumer [Member] | Home equity [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	195	346	252
Recognized interest income	$ 2	$ 2	$ 7
Consumer [Member] | Construction [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment
Recognized interest income
Consumer [Member] | Other [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	$ 257	$ 266	$ 208
Recognized interest income		$ 2	$ 7