Loans (Activity in Allowance for Loan Losses by Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses, beginning of period	$ 15,991	$ 16,634	$ 16,038	$ 16,815	$ 16,815
Provision charged to expense	550	1,850	1,500	3,200	6,025
Losses charged off	(970)	(2,916)	(2,070)	(4,783)	(8,002)
Recoveries	130	435	233	771	1,200
Allowance for loan losses, end of period	15,701	16,003	15,701	16,003	16,038
Allowance for loan losses, individually evaluated for impairment, ending balance	1,046		1,046		1,373
Allowance for loan losses, collectively evaluated for impairment, ending balance	14,655		14,655		14,665
Total allowance for loan losses	15,701	16,003	15,701	16,003	16,038
Loans, individually evaluated for impairment, ending balance	14,307		14,307		19,121
Loans, collectively evaluated for impairment, ending balance	963,806		963,806		971,448
Total loans	978,113		978,113		990,569
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses, beginning of period	9,873	10,244	9,908	10,602	10,602
Provision charged to expense	471	1,035	671	1,425	3,213
Losses charged off	(731)	(1,649)	(968)	(2,550)	(4,493)
Recoveries	20	374	22	527	586
Allowance for loan losses, end of period	9,633	10,004	9,633	10,004	9,908
Allowance for loan losses, individually evaluated for impairment, ending balance	1,025		1,025		1,316
Allowance for loan losses, collectively evaluated for impairment, ending balance	8,608		8,608		8,592
Total allowance for loan losses	9,633	10,004	9,633	10,004	9,908
Loans, individually evaluated for impairment, ending balance	11,423		11,423		15,704
Loans, collectively evaluated for impairment, ending balance	275,442		275,442		273,144
Total loans	286,865		286,865		288,848
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses, beginning of period	3,534	3,471	3,394	3,444	3,444
Provision charged to expense	184	625	684	1,091	1,612
Losses charged off	(59)	(706)	(442)	(1,147)	(1,901)
Recoveries	3	2	26	4	239
Allowance for loan losses, end of period	3,662	3,392	3,662	3,392	3,394
Allowance for loan losses, individually evaluated for impairment, ending balance	21		21		57
Allowance for loan losses, collectively evaluated for impairment, ending balance	3,641		3,641		3,337
Total allowance for loan losses	3,662	3,392	3,662	3,392	3,394
Loans, individually evaluated for impairment, ending balance	2,884		2,884		3,417
Loans, collectively evaluated for impairment, ending balance	487,531		487,531		499,202
Total loans	490,415		490,415		502,619
Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses, beginning of period	2,584	2,919	2,736	2,769	2,769
Provision charged to expense	(105)	190	145	684	1,200
Losses charged off	(180)	(561)	(660)	(1,086)	(1,608)
Recoveries	107	59	185	240	375
Allowance for loan losses, end of period	2,406	2,607	2,406	2,607	2,736
Allowance for loan losses, collectively evaluated for impairment, ending balance	2,406		2,406		2,736
Total allowance for loan losses	2,406	2,607	2,406	2,607	2,736
Loans, collectively evaluated for impairment, ending balance	200,833		200,833		199,102
Total loans	$ 200,833		$ 200,833		$ 199,102