Loans and Allowance for Loan Losses (Allowance for Loans Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, beginning of period	$ 16,084	$ 17,043	$ 14,953	$ 16,025
Provision charged to expense	2,280	2,280	4,560	4,860
Losses charged off	(3,460)	(1,442)	(5,521)	(3,589)
Recoveries	406	924	1,318	1,509
Allowance, end of period	15,310	18,805	15,310	18,805
Allowance for loan losses, Individually evaluated for impairment	3,638	8,633	3,638	8,633	3,729
Allowance for loan losses, Collectively evaluated for impairment	11,672	10,172	11,672	10,172	11,224
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0	0
Loans, net of unearned income	982,596	1,044,595	982,596	1,044,595	996,340
Loans, Individually evaluated for impairment	65,244	89,730	65,244	89,730	67,562
Loans, Collectively evaluated for impairment	917,352	954,865	917,352	954,865	928,778
Loans, Loans acquired with deteriorated credit quality	0	0	0	0	0
Construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, beginning of period	4,426	4,124	4,131	3,942
Provision charged to expense	903	13	935	127
Losses charged off	(1,414)	(111)	(1,506)	(331)
Recoveries	233	594	588	882
Allowance, end of period	4,148	4,620	4,148	4,620
Allowance for loan losses, Individually evaluated for impairment	1,120	3,333	1,120	3,333	1,750
Allowance for loan losses, Collectively evaluated for impairment	3,028	1,287	3,028	1,287	2,381
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0	0
Loans, net of unearned income	67,814	87,826	67,814	87,826	69,325
Loans, Individually evaluated for impairment	11,372	27,702	11,372	27,702	18,159
Loans, Collectively evaluated for impairment	56,442	60,124	56,442	60,124	51,166
Loans, Loans acquired with deteriorated credit quality	0	0	0	0	0
Other Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, beginning of period	5,280	3,165	4,073	2,763
Provision charged to expense	700	1,295	3,146	2,092
Losses charged off	(1,231)	(515)	(2,584)	(1,017)
Recoveries	27	157	141	264
Allowance, end of period	4,776	4,102	4,776	4,102
Allowance for loan losses, Individually evaluated for impairment	1,372	2,658	1,372	2,658	894
Allowance for loan losses, Collectively evaluated for impairment	3,404	1,444	3,404	1,444	3,179
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0	0
Loans, net of unearned income	499,370	533,720	499,370	533,720	505,180
Loans, Individually evaluated for impairment	44,696	50,559	44,696	50,559	40,770
Loans, Collectively evaluated for impairment	454,674	483,161	454,674	483,161	464,410
Loans, Loans acquired with deteriorated credit quality	0	0	0	0	0
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, beginning of period	2,856	5,023	3,347	4,442
Provision charged to expense	406	421	51	1,798
Losses charged off	(271)	(255)	(479)	(1,095)
Recoveries	32	93	104	137
Allowance, end of period	3,023	5,282	3,023	5,282
Allowance for loan losses, Individually evaluated for impairment	496	1,341	496	1,341	485
Allowance for loan losses, Collectively evaluated for impairment	2,527	3,941	2,527	3,941	2,862
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0	0
Loans, net of unearned income	147,773	152,063	147,773	152,063	155,330
Loans, Individually evaluated for impairment	1,371	4,121	1,371	4,121	1,544
Loans, Collectively evaluated for impairment	146,402	147,942	146,402	147,942	153,786
Loans, Loans acquired with deteriorated credit quality	0	0	0	0	0
Residential
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, beginning of period	2,946	3,606	2,607	3,701
Provision charged to expense	168	366	426	566
Losses charged off	(357)	(326)	(596)	(706)
Recoveries	35	36	355	121
Allowance, end of period	2,792	3,682	2,792	3,682
Allowance for loan losses, Individually evaluated for impairment	556	1,261	556	1,261	563
Allowance for loan losses, Collectively evaluated for impairment	2,236	2,421	2,236	2,421	2,044
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0	0
Loans, net of unearned income	226,110	226,823	226,110	226,823	223,839
Loans, Individually evaluated for impairment	7,599	6,842	7,599	6,842	6,924
Loans, Collectively evaluated for impairment	218,511	219,981	218,511	219,981	216,915
Loans, Loans acquired with deteriorated credit quality	0	0	0	0	0
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, beginning of period	576	1,125	795	1,177
Provision charged to expense	103	185	2	277
Losses charged off	(187)	(235)	(356)	(440)
Recoveries	79	44	130	105
Allowance, end of period	571	1,119	571	1,119
Allowance for loan losses, Individually evaluated for impairment	94	40	94	40	37
Allowance for loan losses, Collectively evaluated for impairment	477	1,079	477	1,079	758
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0	0
Loans, net of unearned income	41,529	44,163	41,529	44,163	42,666
Loans, Individually evaluated for impairment	206	506	206	506	165
Loans, Collectively evaluated for impairment	41,323	43,657	41,323	43,657	42,501
Loans, Loans acquired with deteriorated credit quality	0	0	0	0	0
Unallocated
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance, beginning of period	0	0	0	0
Provision charged to expense	0	0	0	0
Losses charged off	0	0	0	0
Recoveries	0	0	0	0
Allowance, end of period	0	0	0	0
Allowance for loan losses, Individually evaluated for impairment	0	0	0	0	0
Allowance for loan losses, Collectively evaluated for impairment	0	0	0	0	0
Allowance for loan losses, Loans acquired with deteriorated credit quality	0	0	0	0	0
Loans, net of unearned income	0	0	0	0	0
Loans, Individually evaluated for impairment	0	0	0	0	0
Loans, Collectively evaluated for impairment	0	0	0	0	0
Loans, Loans acquired with deteriorated credit quality	$ 0	$ 0	$ 0	$ 0	$ 0