Allowance For Loan Losses - Allowance For Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	$ 18,153	$ 16,723	$ 16,282
Charge-Offs	(1,482)	(826)	(625)
Recoveries	728	502	1,702
Provision (benefit)	2,298	1,754	(636)
Balance, end of period	19,697	18,153	16,723
Individually evaluated for impairment	614	344	75
Collectively evaluated for impairment	19,083	17,809	16,648
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	5,906	5,643	5,779
Charge-Offs	(903)	(616)	(319)
Recoveries	699	379	1,041
Provision (benefit)	(167)	500	(858)
Balance, end of period	5,535	5,906	5,643
Individually evaluated for impairment	614	344	75
Collectively evaluated for impairment	4,921	5,562	5,568
Real estate construction one-to-four family
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	854	644	557
Charge-Offs	(535)	0	0
Recoveries	0	0	625
Provision (benefit)	231	210	(538)
Balance, end of period	550	854	644
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	550	854	644
Real estate construction other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	1,439	1,653	539
Charge-Offs	0	0	0
Recoveries	0	0	0
Provision (benefit)	26	(214)	1,114
Balance, end of period	1,465	1,439	1,653
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	1,465	1,439	1,653
Real estate term owner occupied
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	1,657	1,580	1,583
Charge-Offs	0	0	(160)
Recoveries	0	0	0
Provision (benefit)	701	77	157
Balance, end of period	2,358	1,657	1,580
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	2,358	1,657	1,580
Real estate term non-owner occupied
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	5,515	4,704	4,297
Charge-Offs	0	0	0
Recoveries	0	0	0
Provision (benefit)	1,338	811	407
Balance, end of period	6,853	5,515	4,704
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	6,853	5,515	4,704
Real estate term other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	628	656	537
Charge-Offs	0	(81)	0
Recoveries	0	107	0
Provision (benefit)	191	(54)	119
Balance, end of period	819	628	656
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	819	628	656
Consumer secured by 1st deeds of trust
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	264	285	322
Charge-Offs	(36)	(28)	(59)
Recoveries	0	3	4
Provision (benefit)	85	4	18
Balance, end of period	313	264	285
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	313	264	285
Consumer other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	397	410	390
Charge-Offs	(8)	(101)	(87)
Recoveries	29	13	32
Provision (benefit)	(10)	75	75
Balance, end of period	408	397	410
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	408	397	410
Unallocated
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	1,493	1,148	2,278
Charge-Offs	0	0	0
Recoveries	0	0	0
Provision (benefit)	(97)	345	(1,130)
Balance, end of period	1,396	1,493	1,148
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	$ 1,396	$ 1,493	$ 1,148