Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Summary of activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated.
Beginning balance	$ 45,849	$ 43,962	$ 45,914	$ 42,571
Charge-offs	(3,368)	(4,428)	(12,478)	(16,707)
Recoveries	1,133	697	2,811	1,805
Provisions	532	5,069	7,899	17,631
Ending balance	44,146	45,300	44,146	45,300
Ending balance:
Total loans	1,575,647	1,575,627	1,575,647	1,575,627	1,551,032
Individually evaluated for impairment, Allowance for Loan Losses	5,759	5,082	5,759	5,082
Loans pooled for evaluation, Allowance for Loan Losses	33,507	37,229	33,507	37,229
Loans acquired with deteriorated credit quality, Allowance for Loan Losses	4,880	2,989	4,880	2,989
Individually evaluated for impairment loans, net of unearned fees	108,974	108,778	108,974	108,778	114,841
Loans pooled for evaluation, net of unearned fees	1,390,324	1,377,350	1,390,324	1,377,350	1,354,837
Loans acquired with deteriorated credit quality, net of unearned fees	76,349	89,499	76,349	89,499	81,354
RE Mortgage [Member]
Summary of activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated.
Beginning balance					45,914
Ending balance					45,914
RE Mortgage [Member] | Residential [Member]
Summary of activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated.
Beginning balance	3,458	2,521	2,404	3,007
Charge-offs	(370)	(170)	(918)	(1,616)
Recoveries		9	27	121
Provisions	492	487	2,067	1,335
Ending balance	3,580	2,847	3,580	2,847
Ending balance:
Total loans	134,041	140,815	134,041	140,815	139,586
Individually evaluated for impairment, Allowance for Loan Losses	794	920	794	920
Loans pooled for evaluation, Allowance for Loan Losses	2,415	1,907	2,415	1,907
Loans acquired with deteriorated credit quality, Allowance for Loan Losses	371	20	371	20
Individually evaluated for impairment loans, net of unearned fees	9,285	9,835	9,285	9,835	10,167
Loans pooled for evaluation, net of unearned fees	118,702	124,461	118,702	124,461	122,903
Loans acquired with deteriorated credit quality, net of unearned fees	6,054	6,519	6,054	6,519	6,516
RE Mortgage [Member] | Commercial [Member]
Summary of activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated.
Beginning balance	9,566	13,419	13,217	12,700
Charge-offs	(340)	(1,176)	(2,008)	(3,165)
Recoveries	181	24	999	90
Provisions	630	935	(2,171)	3,576
Ending balance	10,037	13,202	10,037	13,202
Ending balance:
Total loans	873,391	826,516	873,391	826,516	826,336
Individually evaluated for impairment, Allowance for Loan Losses	1,234	1,329	1,234	1,329
Loans pooled for evaluation, Allowance for Loan Losses	8,239	11,709	8,239	11,709
Loans acquired with deteriorated credit quality, Allowance for Loan Losses	564	163	564	163
Individually evaluated for impairment loans, net of unearned fees	68,887	68,348	68,887	68,348	71,893
Loans pooled for evaluation, net of unearned fees	771,971	720,418	771,971	720,418	721,217
Loans acquired with deteriorated credit quality, net of unearned fees	32,533	37,750	32,533	37,750	33,226
Home Equity Lines [Member]
Summary of activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated.
Beginning balance	21,602	16,480	18,258	15,054
Charge-offs	(1,636)	(1,860)	(6,739)	(7,389)
Recoveries	160	210	307	457
Provisions	1,176	211	9,476	8,829
Ending balance	21,302	16,951	21,302	16,951
Ending balance:
Total loans	342,898	357,877	342,898	357,877	357,305
Individually evaluated for impairment, Allowance for Loan Losses	2,140	1,577	2,140	1,577
Loans pooled for evaluation, Allowance for Loan Losses	17,899	14,773	17,899	14,773
Loans acquired with deteriorated credit quality, Allowance for Loan Losses	1,263	601	1,263	601
Individually evaluated for impairment loans, net of unearned fees	9,946	7,686	9,946	7,686	9,388
Loans pooled for evaluation, net of unearned fees	318,987	335,179	318,987	335,179	333,348
Loans acquired with deteriorated credit quality, net of unearned fees	13,965	15,012	13,965	15,012	14,569
Home Equity Loans [Member]
Summary of activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated.
Beginning balance	1,159	1,171	1,101	795
Charge-offs	(12)	(287)	(170)	(551)
Recoveries	6	29	15	31
Provisions	100	174	307	812
Ending balance	1,253	1,087	1,253	1,087
Ending balance:
Total loans	14,270	15,282	14,270	15,282	14,844
Individually evaluated for impairment, Allowance for Loan Losses	174	92	174	92
Loans pooled for evaluation, Allowance for Loan Losses	999	995	999	995
Loans acquired with deteriorated credit quality, Allowance for Loan Losses	79		79
Individually evaluated for impairment loans, net of unearned fees	683	556	683	556	661
Loans pooled for evaluation, net of unearned fees	13,383	14,570	13,383	14,570	14,026
Loans acquired with deteriorated credit quality, net of unearned fees	204	156	204	156	157
Auto Indirect [Member]
Summary of activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated.
Beginning balance	433	384	215	1,229
Charge-offs	(12)	(105)	(83)	(340)
Recoveries	72	76	171	259
Provisions	(161)	(48)	29	(841)
Ending balance	332	307	332	307
Ending balance:
Total loans	5,067	13,551	5,067	13,551	10,821
Individually evaluated for impairment, Allowance for Loan Losses	9	76	9	76
Loans pooled for evaluation, Allowance for Loan Losses	324	231	324	231
Loans acquired with deteriorated credit quality, Allowance for Loan Losses
Individually evaluated for impairment loans, net of unearned fees	260	804	260	804	571
Loans pooled for evaluation, net of unearned fees	4,807	12,747	4,807	12,747	10,250
Loans acquired with deteriorated credit quality, net of unearned fees
Other Consumer [Member]
Summary of activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated.
Beginning balance	621	822	932	701
Charge-offs	(280)	(325)	(928)	(858)
Recoveries	211	266	653	640
Provisions	132	122	27	402
Ending balance	684	885	684	885
Ending balance:
Total loans	26,609	22,755	26,609	22,755	23,360
Individually evaluated for impairment, Allowance for Loan Losses	45	21	45	21
Loans pooled for evaluation, Allowance for Loan Losses	640	864	640	864
Loans acquired with deteriorated credit quality, Allowance for Loan Losses
Individually evaluated for impairment loans, net of unearned fees	136	104	136	104	109
Loans pooled for evaluation, net of unearned fees	26,450	22,597	26,450	22,597	23,202
Loans acquired with deteriorated credit quality, net of unearned fees	23	54	23	54	49
C&I [Member]
Summary of activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated.
Beginning balance	5,694	6,812	6,545	5,991
Charge-offs	(625)	(449)	(1,202)	(2,207)
Recoveries	91	80	227	142
Provisions	(389)	574	(799)	3,091
Ending balance	4,771	7,017	4,771	7,017
Ending balance:
Total loans	145,469	151,882	145,469	151,882	139,131
Individually evaluated for impairment, Allowance for Loan Losses	773	260	773	260
Loans pooled for evaluation, Allowance for Loan Losses	2,445	4,935	2,445	4,935
Loans acquired with deteriorated credit quality, Allowance for Loan Losses	1,553	1,822	1,553	1,822
Individually evaluated for impairment loans, net of unearned fees	8,696	8,032	8,696	8,032	9,526
Loans pooled for evaluation, net of unearned fees	124,487	128,051	124,487	128,051	115,765
Loans acquired with deteriorated credit quality, net of unearned fees	12,286	15,799	12,286	15,799	13,840
Construction [Member] | Residential [Member]
Summary of activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated.
Beginning balance	1,679	1,697	1,817	1,824
Charge-offs			(362)	(430)
Recoveries	412	3	412	25
Provisions	(802)	748	(578)	1,029
Ending balance	1,289	2,448	1,289	2,448
Ending balance:
Total loans	18,332	28,802	18,332	28,802	22,122
Individually evaluated for impairment, Allowance for Loan Losses	40	326	40	326
Loans pooled for evaluation, Allowance for Loan Losses	465	1,739	465	1,739
Loans acquired with deteriorated credit quality, Allowance for Loan Losses	783	383	783	383
Individually evaluated for impairment loans, net of unearned fees	4,126	6,126	4,126	6,126	5,627
Loans pooled for evaluation, net of unearned fees	6,448	11,698	6,448	11,698	8,281
Loans acquired with deteriorated credit quality, net of unearned fees	7,758	10,978	7,758	10,978	8,214
Construction [Member] | Commercial [Member]
Summary of activity in the allowance for loan losses, and ending balance of loans, net of unearned fees for the periods indicated.
Beginning balance	1,637	656	1,425	1,270
Charge-offs	(93)	(56)	(68)	(151)
Recoveries				40
Provisions	(646)	(43)	(459)	(602)
Ending balance	898	557	898	557
Ending balance:
Total loans	15,570	18,147	15,570	18,147	17,527
Individually evaluated for impairment, Allowance for Loan Losses	550	481	550	481
Loans pooled for evaluation, Allowance for Loan Losses	81	76	81	76
Loans acquired with deteriorated credit quality, Allowance for Loan Losses	267		267
Individually evaluated for impairment loans, net of unearned fees	6,955	7,287	6,955	7,287	6,899
Loans pooled for evaluation, net of unearned fees	5,089	7,629	5,089	7,629	5,845
Loans acquired with deteriorated credit quality, net of unearned fees	$ 3,526	$ 3,231	$ 3,526	$ 3,231	$ 4,783