Loans and Allowance for Loan Losses (Details 11) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 2,048,941	$ 2,035,258
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,208,524	1,149,443
Commercial Real Estate [Member] | Acquired Non-Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	166,313	192,016
Special Mention	12,967	6,993
Substandard	10,420	11,080
Doubtful	0	500
Loss	0	0
Total Loans	189,700	210,589
Commercial Real Estate [Member] | Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	63,785	69,401
Special Mention	15,638	19,744
Substandard	17,299	14,960
Doubtful	11,522	10,642
Loss	0	10
Total Loans	108,244	114,757
Commercial Real Estate [Member] | Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	817,261	739,050
Special Mention	40,916	39,562
Substandard	52,403	45,485
Doubtful	0	0
Loss	0	0
Total Loans	910,580	824,097
Commercial Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	197,548	217,194
Commercial Construction [Member] | Acquired Non-Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	17,848	24,060
Special Mention	2,395	2,228
Substandard	6,557	3,580
Doubtful	0	0
Loss	0	0
Total Loans	26,800	29,868
Commercial Construction [Member] | Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	11,798	14,605
Special Mention	1,940	1,493
Substandard	7,777	9,715
Doubtful	1,855	7,634
Loss	0	0
Total Loans	23,370	33,447
Commercial Construction [Member] | Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	115,370	115,996
Special Mention	13,196	18,088
Substandard	18,812	19,795
Doubtful	0	0
Loss	0	0
Total Loans	147,378	153,879
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	174,523	161,768
Commercial and Industrial [Member] | Acquired Non-Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	17,718	24,491
Special Mention	896	1,401
Substandard	658	326
Doubtful	0	0
Loss	0	240
Total Loans	19,272	26,458
Commercial and Industrial [Member] | Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	5,294	6,251
Special Mention	1,756	2,745
Substandard	721	1,118
Doubtful	1,212	784
Loss	0	0
Total Loans	8,983	10,898
Commercial and Industrial [Member] | Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	137,757	117,546
Special Mention	5,482	4,385
Substandard	3,018	2,481
Doubtful	11	0
Loss	0	0
Total Loans	146,268	124,412
Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	14,949	13,209
Leases [Member] | Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	14,949	13,209
Special Mention	0	0
Substandard	0	0
Doubtful	0	0
Loss	0	0
Total Loans	14,949	13,209
Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	33,125	34,729
Residential Construction [Member] | Acquired Non-Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	1,997	7,086
Special Mention	1,795	176
Substandard	954	5,548
Doubtful	0	0
Loss	0	0
Total Loans	4,746	12,810
Residential Construction [Member] | Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	196	16
Special Mention	16	199
Substandard	0	0
Doubtful	0	0
Loss	0	0
Total Loans	212	215
Residential Construction [Member] | Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	25,859	19,546
Special Mention	544	440
Substandard	1,764	1,718
Doubtful	0	0
Loss	0	0
Total Loans	28,167	21,704
Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	409,437	446,275
Residential Mortgage [Member] | Acquired Non-Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	48,754	57,965
Special Mention	6,262	4,445
Substandard	4,544	4,119
Doubtful	0	0
Loss	0	0
Total Loans	59,560	66,529
Residential Mortgage [Member] | Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	39,982	46,039
Special Mention	14,099	17,069
Substandard	9,478	11,956
Doubtful	12,189	11,808
Loss	408	143
Total Loans	76,156	87,015
Residential Mortgage [Member] | Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	235,094	250,083
Special Mention	19,860	21,831
Substandard	18,767	20,817
Doubtful	0	0
Loss	0	0
Total Loans	273,721	292,731
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	10,835	12,640
Consumer and Other [Member] | Acquired Non-Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	563	903
Special Mention	70	10
Substandard	4	5
Doubtful	0	0
Loss	0	0
Total Loans	637	918
Consumer and Other [Member] | Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	2,077	2,237
Special Mention	168	291
Substandard	71	58
Doubtful	1	11
Loss	0	1
Total Loans	2,317	2,598
Consumer and Other [Member] | Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	7,606	8,760
Special Mention	195	320
Substandard	80	44
Doubtful	0	0
Loss	0	0
Total Loans	7,881	9,124
Total Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	1,730,221	1,709,260
Special Mention	138,195	141,420
Substandard	153,327	152,805
Doubtful	26,790	31,379
Loss	408	394
Total Loans	2,048,941	2,035,258
Total Loans [Member] | Acquired Non-Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	253,193	306,521
Special Mention	24,385	15,253
Substandard	23,137	24,658
Doubtful	0	500
Loss	0	240
Total Loans	300,715	347,172
Total Loans [Member] | Covered [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	123,132	138,549
Special Mention	33,617	41,541
Substandard	35,346	37,807
Doubtful	26,779	30,879
Loss	408	154
Total Loans	219,282	248,930
Total Loans [Member] | Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Pass Credits	1,353,896	1,264,190
Special Mention	80,193	84,626
Substandard	94,844	90,340
Doubtful	11	0
Loss	0	0
Total Loans	$ 1,528,944	$ 1,439,156