Loans and Allowance for Loan Losses (Details 6) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Specific Reserves, Impaired Loans	$ 5,509		$ 5,219
Purchase Credit Impaired Loans, Allowance	8,641		14,809
Total Specific Reserve	14,150		20,028
General Reserves	18,709		20,264
Total Allowance for Loan Losses	32,859	38,148	40,292	40,856	36,722	31,008
Commercial Real Estate [Member]
Specific Reserves, Impaired Loans	2,926		578
Purchase Credit Impaired Loans, Allowance	4,516		6,518
Total Specific Reserve	7,442		7,096
General Reserves	5,449		8,622
Total Allowance for Loan Losses	12,891		15,718
Commercial Construction [Member]
Specific Reserves, Impaired Loans	738		3,023
Purchase Credit Impaired Loans, Allowance	613		2,704
Total Specific Reserve	1,351		5,727
General Reserves	5,646		4,080
Total Allowance for Loan Losses	6,997		9,807
Commercial and Industrial [Member]
Specific Reserves, Impaired Loans	24		4
Purchase Credit Impaired Loans, Allowance	717		1,569
Total Specific Reserve	741		1,573
General Reserves	2,800		2,005
Total Allowance for Loan Losses	3,541		3,578
Leases [Member]
Specific Reserves, Impaired Loans	0		0
Purchase Credit Impaired Loans, Allowance	0		0
Total Specific Reserve	0		0
General Reserves	0		18
Total Allowance for Loan Losses	0		18
Residential Construction [Member]
Specific Reserves, Impaired Loans	52		2
Purchase Credit Impaired Loans, Allowance	0		0
Total Specific Reserve	52		2
General Reserves	325		591
Total Allowance for Loan Losses	377		593
Residential Mortgage [Member]
Specific Reserves, Impaired Loans	1,717		1,612
Purchase Credit Impaired Loans, Allowance	2,795		4,000
Total Specific Reserve	4,512		5,612
General Reserves	4,261		4,829
Total Allowance for Loan Losses	8,773		10,441
Consumer and Other [Member]
Specific Reserves, Impaired Loans	52		0
Purchase Credit Impaired Loans, Allowance	0		18
Total Specific Reserve	52		18
General Reserves	228		119
Total Allowance for Loan Losses	$ 280		$ 137