Loans and Allowance for Loan Losses - Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment, Total	$ 17,874	$ 23,856	$ 17,874	$ 23,856	$ 21,511
Unpaid Principal Balance, Total	23,871	33,069	23,871	33,069	27,317
Related Allowance, Total	886	1,547	886	1,547	938
Average Recorded Balance, Total	19,432	24,860	19,328	25,756	24,579
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	13,235	14,625	13,235	14,625	15,530
Unpaid Principal Balance	17,060	19,617	17,060	19,617	20,438
Related Allowance	0	0	0	0	0
Average Recorded Balance	13,255	16,127	13,008	16,667	16,705
Recorded Investment	2,036	5,523	2,036	5,523	2,312
Unpaid Principal Balance	2,872	8,842	2,872	8,842	2,319
Related Allowance	703	1,462	703	1,462	865
Average Recorded Balance	2,849	5,139	3,120	5,781	4,374
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	149	245	149	245	214
Unpaid Principal Balance	466	298	466	298	267
Related Allowance	0	0	0	0	0
Average Recorded Balance	751	203	568	167	186
Recorded Investment	35	343	35	343	258
Unpaid Principal Balance	35	343	35	343	258
Related Allowance	5	79	5	79	73
Average Recorded Balance	146	342	183	396	346
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	1,178	1,613	1,178	1,613	1,731
Unpaid Principal Balance	1,391	1,801	1,391	1,801	1,940
Related Allowance	0	0	0	0	0
Average Recorded Balance	1,208	1,802	1,216	1,800	1,832
Recorded Investment	178	57	178	57	0
Unpaid Principal Balance	178	154	178	154	0
Related Allowance	178	6	178	6	0
Average Recorded Balance	100	29	73	60	0
Home equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	852	1,107	852	1,107	1,111
Unpaid Principal Balance	1,535	1,518	1,535	1,518	1,623
Related Allowance	0	0	0	0	0
Average Recorded Balance	903	897	928	669	847
Recorded Investment	0	0	0	0	0
Unpaid Principal Balance	0	0	0	0	0
Related Allowance	0	0	0	0	0
Average Recorded Balance	0	0	0	0	0
Indirect
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	147	191	147	191	195
Unpaid Principal Balance	231	293	231	293	268
Related Allowance	0	0	0	0	0
Average Recorded Balance	156	208	168	129	178
Recorded Investment	0	0	0	0	0
Unpaid Principal Balance	0	0	0	0	0
Related Allowance	0	0	0	0	0
Average Recorded Balance	0	0	0	0	0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded Investment	64	152	64	152	160
Unpaid Principal Balance	103	203	103	203	204
Related Allowance	0	0	0	0	0
Average Recorded Balance	64	113	64	87	111
Recorded Investment	0	0	0	0	0
Unpaid Principal Balance	0	0	0	0	0
Related Allowance	0	0	0	0	0
Average Recorded Balance	$ 0	$ 0	$ 0	$ 0	$ 0