Loans and Allowance for Loan Losses (Details 8) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Commercial Real Estate [Member] | Acquired Non-Covered [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	$ 0	$ 500
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	800
Impaired Financing Receivable, Related Allowance	0	16
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	173	248
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	180	256
Commercial Real Estate [Member] | Covered [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, Related Allowance	0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	745	548
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	779	625
Commercial Real Estate [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	27,652	7,918
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	27,585	7,891
Impaired Financing Receivable, Related Allowance	2,926	562
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	6,522	17,915
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	6,507	17,867
Commercial Construction [Member] | Acquired Non-Covered [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0
Impaired Financing Receivable, Related Allowance	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	245
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	245
Commercial Construction [Member] | Covered [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, Related Allowance	0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	313	530
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	340	561
Commercial Construction [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	4,982	11,838
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	5,046	11,815
Impaired Financing Receivable, Related Allowance	738	3,022
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	7,981	7,581
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	8,287	7,552
Commercial and Industrial [Member] | Acquired Non-Covered [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	240
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	240
Impaired Financing Receivable, Related Allowance	0	3
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	298	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	310	0
Commercial and Industrial [Member] | Covered [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, Related Allowance	0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	137	143
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	170	176
Commercial and Industrial [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	778	99
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	776	99
Impaired Financing Receivable, Related Allowance	24	1
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	1,352
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	1,351
Residential Construction [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	583	362
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	582	361
Impaired Financing Receivable, Related Allowance	52	2
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	0
Residential Mortgage [Member] | Acquired Non-Covered [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	601
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	607
Impaired Financing Receivable, Related Allowance	0	87
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,659	765
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,805	895
Residential Mortgage [Member] | Covered [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, Related Allowance	0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	6,647	5,504
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	6,885	5,749
Residential Mortgage [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	14,523	10,772
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	14,487	10,755
Impaired Financing Receivable, Related Allowance	1,717	1,526
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	826	4,801
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	826	4,788
Consumer and Other [Member] | Acquired Non-Covered [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, Related Allowance	0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	4	5
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	5	5
Consumer and Other [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	62	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	62	0
Impaired Financing Receivable, Related Allowance	52	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	124
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	122
Total Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	48,580	32,330
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	48,538	32,568
Impaired Financing Receivable, Related Allowance	5,509	5,219
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	25,550	39,516
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	26,339	39,947
Total Loans [Member] | Acquired Non-Covered [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	1,341
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	1,647
Impaired Financing Receivable, Related Allowance	0	106
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,379	1,018
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	2,545	1,156
Total Loans [Member] | Covered [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Impaired Financing Receivable, Related Allowance	0	0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	7,842	6,725
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	8,174	7,111
Total Loans [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	48,580	30,989
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	48,538	30,921
Impaired Financing Receivable, Related Allowance	5,509	5,113
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	15,329	31,773
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	$ 15,620	$ 31,680