Allowance for Loan Losses - Balance Of The Allowance Segregated By Segment And Class (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$ 119		$ 416
Collectively evaluated for impairment	18,064		16,531
Total	18,183	$ 18,153	16,947	$ 16,723
Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	16,506	16,290
Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	22	18
Asset Quality Rating - Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	119	344
Collectively evaluated for impairment	18	8
Unallocated
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	1,518	1,493
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	119		361
Collectively evaluated for impairment	5,630		5,730
Total	5,749	5,906	6,091	5,643
Commercial | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	5,606	5,543
Commercial | Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	15	11
Commercial | Asset Quality Rating - Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	119	344
Collectively evaluated for impairment	9	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
Collectively evaluated for impairment	760		757
Total	760	854	757	644
Real Estate Construction One-To- Four Family | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	760	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
Collectively evaluated for impairment	1,621		1,663
Total	1,621	1,439	1,663	1,653
Real Estate Construction Other | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	1,621	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
Collectively evaluated for impairment	1,739		1,570
Total	1,739	1,657	1,570	1,580
Real Estate Term Owner Occupied | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	1,739	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
Collectively evaluated for impairment	5,498		4,794
Total	5,498	5,515	4,794	4,704
Real Estate Term Non-Owner Occupied | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	5,498	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		55
Collectively evaluated for impairment	638		701
Total	638	628	756	656
Real Estate Term Other | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	634	624
Real Estate Term Other | Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	4	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 Deed Of Trust
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	264		274
Total	264	264	274	285
Consumer Secured By 1st Deed Of Trust | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	261	261
Consumer Secured By 1st Deed 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 Deed 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 Deed 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
Collectively evaluated for impairment	396		402
Total	396	397	402	410
Consumer Other | Asset Quality Rating - Pass
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	387	397
Consumer Other | Asset Quality Rating - Special Mention
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	0	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	9	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
Collectively evaluated for impairment	1,518		640
Total	1,518	1,493	$ 640	$ 1,148
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	$ 1,518	$ 1,493