Allowance For Loan Losses - Balance Of The Allowance Segregated By Segment And Class (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$ 614	$ 344	$ 75
Collectively evaluated for impairment	19,083	17,809	16,648
Total	19,697	18,153	16,723	$ 16,282
Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	17,628	16,290
Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	56	18
Asset Quality Rating - Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	614	344
Collectively evaluated for impairment	3	8
Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	1,396	1,493
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	614	344	75
Collectively evaluated for impairment	4,921	5,562	5,568
Total	5,535	5,906	5,643	5,779
Commercial | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	4,867	5,543
Commercial | Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	51	11
Commercial | Asset Quality Rating - Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	614	344
Collectively evaluated for impairment	3	8
Commercial | Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Real estate construction one-to-four family
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	550	854	644
Total	550	854	644	557
Real estate construction one-to-four family | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	550	854
Real estate construction one-to-four family | Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Real estate construction one-to-four family | Asset Quality Rating - Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Real estate construction one-to-four family | Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Real estate construction other
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	1,465	1,439	1,653
Total	1,465	1,439	1,653	539
Real estate construction other | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	1,465	1,439
Real estate construction other | Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Real estate construction other | Asset Quality Rating - Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Real estate construction other | Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Real estate term owner occupied
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	2,358	1,657	1,580
Total	2,358	1,657	1,580	1,583
Real estate term owner occupied | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	2,358	1,657
Real estate term owner occupied | Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Real estate term owner occupied | Asset Quality Rating - Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Real estate term owner occupied | Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Real estate term non-owner occupied
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	6,853	5,515	4,704
Total	6,853	5,515	4,704	4,297
Real estate term non-owner occupied | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	6,853	5,515
Real estate term non-owner occupied | Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Real estate term non-owner occupied | Asset Quality Rating - Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Real estate term non-owner occupied | Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Real estate term other
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	819	628	656
Total	819	628	656	537
Real estate term other | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	819	624
Real estate term other | Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	4
Real estate term other | Asset Quality Rating - Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Real estate term other | Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Consumer secured by 1st deeds of trust
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	313	264	285
Total	313	264	285	322
Consumer secured by 1st deeds of trust | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	310	261
Consumer secured by 1st deeds of trust | Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	3	3
Consumer secured by 1st deeds of trust | Asset Quality Rating - Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Consumer secured by 1st deeds of trust | Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Consumer other
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	408	397	410
Total	408	397	410	390
Consumer other | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	406	397
Consumer other | Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	2	0
Consumer other | Asset Quality Rating - Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Consumer other | Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	1,396	1,493	1,148
Total	1,396	1,493	$ 1,148	$ 2,278
Unallocated | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Unallocated | Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	0
Unallocated | Asset Quality Rating - Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Unallocated | Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	$ 1,396	$ 1,493