Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	$ 5,774	$ 7,826
Impaired Financing Receivable, Charge-off And Payments Applied	(2,503)	(2,261)
Impaired Financing Receivable, Recorded Investment	3,271	5,565
Impaired Financing Receivable, Related Allowance	194	260
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Interest Income, Accrual Method	119	72	77
Commercial and Industrial Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	70	124
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	70	124
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, With Related Allowance, Related Allowance	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	98	188	194
Impaired Financing Receivable, Interest Income, Accrual Method	7	9	13
Construction And Land Development Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	2,822	2,879
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(2,217)	(1,682)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	605	1,197
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	452
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	0	(67)
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	385
Impaired Financing Receivable, With Related Allowance, Related Allowance	0	88
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	1,032	1,603	3,888
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	0
Commercial Real Estate Owner Occupied Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	331	1,217
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(68)	(190)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	263	1,027
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	846	875
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	846	875
Impaired Financing Receivable, With Related Allowance, Related Allowance	102	110
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	1,308	1,972	2,449
Impaired Financing Receivable, Interest Income, Accrual Method	40	51	64
Commercial Real Estate Other Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	518
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	0	(89)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	429
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	591	602
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	591	602
Impaired Financing Receivable, With Related Allowance, Related Allowance	92	62
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	872	1,454	2,621
Impaired Financing Receivable, Interest Income, Accrual Method	29	12	0
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	331	1,735
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(68)	(279)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	263	1,456
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,437	1,477
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,437	1,477
Impaired Financing Receivable, With Related Allowance, Related Allowance	194	172
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	2,180	3,426	5,070
Impaired Financing Receivable, Interest Income, Accrual Method	69	63	64
Residential Real Estate Consumer Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	934	952
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(192)	(198)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	742	754
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, With Related Allowance, Related Allowance	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	731	786	861
Impaired Financing Receivable, Interest Income, Accrual Method	43	0	0
Residential Real Estate Investment Property Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	180	207
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(26)	(35)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	154	172
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, With Related Allowance, Related Allowance	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	164	274	652
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	0
Residential Real Estate Loans, Total [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,114	1,159
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(218)	(233)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	896	926
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, With Related Allowance, Related Allowance	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	895	1,060	1,513
Impaired Financing Receivable, Interest Income, Accrual Method	43	0	0
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, With Related Allowance, Related Allowance	0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	0	0	0
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	0
Total For Impaired Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	4,337	5,897
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(2,503)	(2,194)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,834	3,703
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,437	1,929
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	0	(67)
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,437	1,862
Impaired Financing Receivable, With Related Allowance, Related Allowance	$ 194	$ 260

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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