Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	$ 5,061		$ 5,061		$ 13,228
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(2,024)		(2,024)		(4,018)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	3,037		3,037		9,210
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	2,632		2,632		1,370
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	(262)		(262)		(45)
Impaired Financing Receivable, with Related Allowance, Recorded Investment	2,370		2,370		1,325
Impaired Financing Receivable, With Related Allowance, Related Allowance	283		283		263
Impaired Financing Receivable, Unpaid Principal Balance	7,693		7,693		14,598
Impaired Financing Receivable, Charge-off And Payments Applied	(2,286)		(2,286)		(4,063)
Impaired Financing Receivable, Recorded Investment	5,407		5,407		10,535
Impaired Financing Receivable, Related Allowance	283		283		263
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	5,308	9,746	6,817	10,309
Impaired Financing Receivable, Interest Income, Accrual Method	16	22	34	43
Commercial and Industrial Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	148		148		169
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	0		0		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	148		148		169
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	150	197	158	205
Impaired Financing Receivable, Interest Income, Accrual Method	2	4	5	8
Construction And Land Development Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	2,878		2,878		2,879
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(1,681)		(1,681)		(1,682)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,197		1,197		1,197
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	461		461		471
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	(57)		(57)		(45)
Impaired Financing Receivable, with Related Allowance, Recorded Investment	404		404		426
Impaired Financing Receivable, Related Allowance	107		107		129
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	1,607	4,185	1,614	4,595
Impaired Financing Receivable, Interest Income, Accrual Method	0	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	350		350		787
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(51)		(51)		(212)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	299		299		575
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,759		1,759		899
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	(118)		(118)		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,641		1,641		899
Impaired Financing Receivable, Related Allowance	120		120		134
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	1,984	2,561	2,019	2,566
Impaired Financing Receivable, Interest Income, Accrual Method	14	18	29	35
Commercial Real Estate Other Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	515		515		7,914
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(86)		(86)		(1,862)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	429		429		6,052
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	430	1,245	1,902	1,500
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	0	0
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	865		865		8,701
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(137)		(137)		(2,074)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	728		728		6,627
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	1,759		1,759		899
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	(118)		(118)		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	1,641		1,641		899
Impaired Financing Receivable, Related Allowance	120		120		134
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	2,414	3,806	3,921	4,066
Impaired Financing Receivable, Interest Income, Accrual Method	14	18	29	35
Residential Real Estate Consumer Mortgage Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	960		960		971
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(177)		(177)		(152)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	783		783		819
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	789	863	801	881
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	0	0
Residential Real Estate Investment Property Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	210		210		508
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(29)		(29)		(110)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	181		181		398
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	412		412
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	(87)		(87)
Impaired Financing Receivable, with Related Allowance, Recorded Investment	325		325
Impaired Financing Receivable, Related Allowance	56		56
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	348	695	323	562
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	0	0
Residential Real Estate Loans, Total [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,170		1,170		1,479
Impaired Financing Receivable, with No Related Allowance, Charge-off And Payments Applied	(206)		(206)		(262)
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	964		964		1,217
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	412		412
Impaired Financing Receivable, with Related Allowance, Charge-off And Payments Applied	(87)		(87)
Impaired Financing Receivable, with Related Allowance, Recorded Investment	325		325
Impaired Financing Receivable, Related Allowance	56		56
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	1,137	1,558	1,124	1,443
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	0	0
Consumer Installment and Revolving Loans [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment	0	0	0	0
Impaired Financing Receivable, Interest Income, Accrual Method	$ 0	$ 0	$ 0	$ 0

Impaired Loans (Details) (USD $)
In Thousands, unless otherwise specified

3 Months Ended

6 Months Ended

Jun. 30, 2013

Jun. 30, 2012

Jun. 30, 2013

Jun. 30, 2012

Dec. 31, 2012

Financing Receivable, Impaired [Line Items]

Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance

$ 5,061

$ 13,228