Loans and Allowance for Loan Losses (Details 6) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	$ 16,477	$ 16,447	$ 16,056
Recognized interest income	87	122	671
Commercial [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	13,900	14,447	14,026
Recognized interest income	71	110	554
Commercial [Member] | Owner occupied RE [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	1,930	1,693	1,519
Recognized interest income	2	2	47
Commercial [Member] | Non-owner occupied RE [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	5,417	6,505	5,932
Recognized interest income	15	73	261
Commercial [Member] | Construction [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	1,829	2,082	2,054
Recognized interest income	14	10	57
Commercial [Member] | Business [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	4,724	4,167	4,521
Recognized interest income	40	25	189
Consumer [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	2,577	2,000	2,030
Recognized interest income	16	12	117
Consumer [Member] | Real estate [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	2,092	984	1,186
Recognized interest income	12	8	100
Consumer [Member] | Home equity [Member]
Average recorded investment and interest income recognized on impaired loans
Average recorded investment	264	769	610
Recognized interest income	2	2	8
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	221	247	234
Recognized interest income	$ 2	$ 2	$ 9