Allowance for Loan Losses - Allowance For Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	$ 17,418	$ 16,032	$ 16,723	$ 16,282
Charge-Offs	(400)	(54)	(588)	(446)
Recoveries	154	265	335	1,543
Provision (benefit)	676	0	1,378	(1,136)
Balance, end of period	17,848	16,243	17,848	16,243
Balance, end of period: Individually evaluated for impairment	513	8	513	8
Balance, end of period: Collectively evaluated for impairment	17,335	16,235	17,335	16,235
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	5,687	5,134	5,643	5,779
Charge-Offs	(367)	0	(474)	(320)
Recoveries	152	259	310	889
Provision (benefit)	308	22	301	(933)
Balance, end of period	5,780	5,415	5,780	5,415
Balance, end of period: Individually evaluated for impairment	433	0	433	0
Balance, end of period: Collectively evaluated for impairment	5,347	5,415	5,347	5,415
Real Estate Construction One-To- Four Family
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	689	570	644	557
Charge-Offs	0	0	0	0
Recoveries	0	0	0	625
Provision (benefit)	202	64	247	(548)
Balance, end of period	891	634	891	634
Balance, end of period: Individually evaluated for impairment	0	0	0	0
Balance, end of period: Collectively evaluated for impairment	891	634	891	634
Real Estate Construction Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	1,863	830	1,653	539
Charge-Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (benefit)	(81)	285	129	576
Balance, end of period	1,782	1,115	1,782	1,115
Balance, end of period: Individually evaluated for impairment	0	0	0	0
Balance, end of period: Collectively evaluated for impairment	1,782	1,115	1,782	1,115
Real Estate Term Owner Occupied
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	1,470	1,384	1,580	1,583
Charge-Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (benefit)	54	177	(56)	(22)
Balance, end of period	1,524	1,561	1,524	1,561
Balance, end of period: Individually evaluated for impairment	0	0	0	0
Balance, end of period: Collectively evaluated for impairment	1,524	1,561	1,524	1,561
Real Estate Term Non-Owner Occupied
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	4,888	4,124	4,704	4,297
Charge-Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (benefit)	54	87	238	(86)
Balance, end of period	4,942	4,211	4,942	4,211
Balance, end of period: Individually evaluated for impairment	0	0	0	0
Balance, end of period: Collectively evaluated for impairment	4,942	4,211	4,942	4,211
Real Estate Term Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	671	642	656	537
Charge-Offs	0	0	(81)	0
Recoveries	0	0	17	0
Provision (benefit)	(69)	254	10	359
Balance, end of period	602	896	602	896
Balance, end of period: Individually evaluated for impairment	0	0	0	0
Balance, end of period: Collectively evaluated for impairment	602	896	602	896
Consumer Secured By 1st Deed Of Trust
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	265	272	285	322
Charge-Offs	(28)	(13)	(28)	(52)
Recoveries	0	0	0	0
Provision (benefit)	31	7	11	(4)
Balance, end of period	268	266	268	266
Balance, end of period: Individually evaluated for impairment	0	8	0	8
Balance, end of period: Collectively evaluated for impairment	268	258	268	258
Consumer Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	415	370	410	390
Charge-Offs	(5)	(41)	(5)	(74)
Recoveries	2	6	8	29
Provision (benefit)	64	53	63	43
Balance, end of period	476	388	476	388
Balance, end of period: Individually evaluated for impairment	80	0	80	0
Balance, end of period: Collectively evaluated for impairment	396	388	396	388
Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	1,470	2,706	1,148	2,278
Charge-Offs	0	0	0	0
Recoveries	0	0	0	0
Provision (benefit)	113	(949)	435	(521)
Balance, end of period	1,583	1,757	1,583	1,757
Balance, end of period: Individually evaluated for impairment	0	0	0	0
Balance, end of period: Collectively evaluated for impairment	$ 1,583	$ 1,757	$ 1,583	$ 1,757