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Loans - Impaired Loans by Class (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Schedule of Financing Receivables [Line Items]
Recorded Investment	$ 32,748	$ 38,255	$ 32,748	$ 38,255	$ 35,862
Unpaid Principal Balance	35,248	40,533	35,248	40,533	39,026
Related Allowance	1,307	3,146	1,307	3,146	1,803
Average Recorded Investment	34,025	38,653	34,573	40,126	38,404
Recognized Interest Income	335	367	637	704	1,465
With No Related Allowance
Schedule of Financing Receivables [Line Items]
Recorded Investment	22,010	25,472	22,010	25,472	26,313
Unpaid Principal Balance	24,106	27,343	24,106	27,343	29,077
Related Allowance	0	0	0	0	0
Average Recorded Investment	22,998	26,036	24,401	27,912	26,926
Recognized Interest Income	218	239	415	454	1,078
With an Allowance Recorded
Schedule of Financing Receivables [Line Items]
Recorded Investment	10,738	12,783	10,738	12,783	9,549
Unpaid Principal Balance	11,142	13,190	11,142	13,190	9,949
Related Allowance	1,307	3,146	1,307	3,146	1,803
Average Recorded Investment	11,027	12,617	10,172	12,214	11,478
Recognized Interest Income	117	128	222	250	387
Commercial real estate
Schedule of Financing Receivables [Line Items]
Recorded Investment	12,566	14,803	12,566	14,803	13,304
Unpaid Principal Balance	13,107	15,498	13,107	15,498	14,212
Related Allowance	225	1,150	225	1,150	346
Average Recorded Investment	12,638	12,846	12,766	14,057	14,120
Recognized Interest Income	132	154	253	282	550
Commercial real estate | With No Related Allowance
Schedule of Financing Receivables [Line Items]
Recorded Investment	8,986	10,688	8,986	10,688	11,687
Unpaid Principal Balance	9,436	11,228	9,436	11,228	12,423
Related Allowance	0	0	0	0	0
Average Recorded Investment	9,020	9,181	9,959	10,458	11,080
Recognized Interest Income	93	112	182	201	488
Commercial real estate | With an Allowance Recorded
Schedule of Financing Receivables [Line Items]
Recorded Investment	3,580	4,115	3,580	4,115	1,617
Unpaid Principal Balance	3,671	4,270	3,671	4,270	1,789
Related Allowance	225	1,150	225	1,150	346
Average Recorded Investment	3,618	3,665	2,807	3,599	3,040
Recognized Interest Income	39	42	71	81	62
Commercial construction
Schedule of Financing Receivables [Line Items]
Recorded Investment	989	1,492	989	1,492	1,380
Unpaid Principal Balance	989	1,492	989	1,492	1,380
Related Allowance	275	487	275	487	413
Average Recorded Investment	1,249	1,047	1,311	1,200	1,309
Recognized Interest Income	13	14	25	28	56
Commercial construction | With No Related Allowance
Schedule of Financing Receivables [Line Items]
Recorded Investment	0	0	0	0	0
Unpaid Principal Balance	0	0	0	0	0
Related Allowance	0	0	0	0	0
Average Recorded Investment	0	52	0	60	30
Recognized Interest Income	0	0	0	0	0
Commercial construction | With an Allowance Recorded
Schedule of Financing Receivables [Line Items]
Recorded Investment	989	1,492	989	1,492	1,380
Unpaid Principal Balance	989	1,492	989	1,492	1,380
Related Allowance	275	487	275	487	413
Average Recorded Investment	1,249	995	1,311	1,140	1,279
Recognized Interest Income	13	14	25	28	56
Commercial other
Schedule of Financing Receivables [Line Items]
Recorded Investment	2,106	4,325	2,106	4,325	2,942
Unpaid Principal Balance	2,186	4,663	2,186	4,663	3,745
Related Allowance	275	830	275	830	129
Average Recorded Investment	2,540	6,117	2,666	6,160	4,956
Recognized Interest Income	30	40	46	68	169
Commercial other | With No Related Allowance
Schedule of Financing Receivables [Line Items]
Recorded Investment	1,789	3,271	1,789	3,271	2,616
Unpaid Principal Balance	1,855	3,549	1,855	3,549	3,407
Related Allowance	0	0	0	0	0
Average Recorded Investment	2,069	4,443	2,267	4,796	3,853
Recognized Interest Income	27	32	42	56	156
Commercial other | With an Allowance Recorded
Schedule of Financing Receivables [Line Items]
Recorded Investment	317	1,054	317	1,054	326
Unpaid Principal Balance	331	1,114	331	1,114	338
Related Allowance	275	830	275	830	129
Average Recorded Investment	471	1,674	399	1,364	1,103
Recognized Interest Income	3	8	4	12	13
Residential term
Schedule of Financing Receivables [Line Items]
Recorded Investment	15,420	16,102	15,420	16,102	16,123
Unpaid Principal Balance	16,619	17,100	16,619	17,100	17,337
Related Allowance	501	606	501	606	519
Average Recorded Investment	15,921	16,247	16,145	16,695	16,243
Recognized Interest Income	150	151	293	311	641
Residential term | With No Related Allowance
Schedule of Financing Receivables [Line Items]
Recorded Investment	9,636	10,271	9,636	10,271	10,820
Unpaid Principal Balance	10,537	11,082	10,537	11,082	11,824
Related Allowance	0	0	0	0	0
Average Recorded Investment	10,458	10,364	10,797	10,845	10,505
Recognized Interest Income	90	88	173	183	402
Residential term | With an Allowance Recorded
Schedule of Financing Receivables [Line Items]
Recorded Investment	5,784	5,831	5,784	5,831	5,303
Unpaid Principal Balance	6,082	6,018	6,082	6,018	5,513
Related Allowance	501	606	501	606	519
Average Recorded Investment	5,463	5,883	5,348	5,850	5,738
Recognized Interest Income	60	63	120	128	239
Residential construction
Schedule of Financing Receivables [Line Items]
Recorded Investment	0	0	0	0	0
Unpaid Principal Balance	0	0	0	0	0
Related Allowance	0	0	0	0	0
Average Recorded Investment	0	0	0	0	0
Recognized Interest Income	0	0	0	0	0
Residential construction | With No Related Allowance
Schedule of Financing Receivables [Line Items]
Recorded Investment	0	0	0	0	0
Unpaid Principal Balance	0	0	0	0	0
Related Allowance	0	0	0	0	0
Average Recorded Investment	0	0	0	0	0
Recognized Interest Income	0	0	0	0	0
Residential construction | With an Allowance Recorded
Schedule of Financing Receivables [Line Items]
Recorded Investment	0	0	0	0	0
Unpaid Principal Balance	0	0	0	0	0
Related Allowance	0	0	0	0	0
Average Recorded Investment	0	0	0	0	0
Recognized Interest Income	0	0	0	0	0
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Recorded Investment	1,572	1,533	1,572	1,533	2,087
Unpaid Principal Balance	2,209	1,780	2,209	1,780	2,324
Related Allowance	31	73	31	73	396
Average Recorded Investment	1,597	2,396	1,633	2,014	1,765
Recognized Interest Income	8	8	17	15	46
Home equity line of credit | With No Related Allowance
Schedule of Financing Receivables [Line Items]
Recorded Investment	1,504	1,242	1,504	1,242	1,164
Unpaid Principal Balance	2,140	1,484	2,140	1,484	1,395
Related Allowance	0	0	0	0	0
Average Recorded Investment	1,371	1,996	1,326	1,753	1,447
Recognized Interest Income	8	7	15	14	29
Home equity line of credit | With an Allowance Recorded
Schedule of Financing Receivables [Line Items]
Recorded Investment	68	291	68	291	923
Unpaid Principal Balance	69	296	69	296	929
Related Allowance	31	73	31	73	396
Average Recorded Investment	226	400	307	261	318
Recognized Interest Income	0	1	2	1	17
Consumer
Schedule of Financing Receivables [Line Items]
Recorded Investment	95	0	95	0	26
Unpaid Principal Balance	138	0	138	0	28
Related Allowance	0	0	0	0	0
Average Recorded Investment	80	0	52	0	11
Recognized Interest Income	2	0	3	0	3
Consumer | With No Related Allowance
Schedule of Financing Receivables [Line Items]
Recorded Investment	95	0	95	0	26
Unpaid Principal Balance	138	0	138	0	28
Related Allowance	0	0	0	0	0
Average Recorded Investment	80	0	52	0	11
Recognized Interest Income	0	0	3	0	3
Consumer | With an Allowance Recorded
Schedule of Financing Receivables [Line Items]
Recorded Investment	0	0	0	0	0
Unpaid Principal Balance	0	0	0	0	0
Related Allowance	0	0	0	0	0
Average Recorded Investment	0	0	0	0	0
Recognized Interest Income	$ 2	$ 0	$ 0	$ 0	$ 0

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