Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Allowance for Loan Losses:
Beginning balance	$ 25,272	$ 18,313		$ 21,958		$ 19,242
Provision for loan losses	2,700	3,199	[1]	4,975	[2]	5,659	[3]
Loans charged off	(6,373)	(1,989)		(8,121)		(5,966)
Recoveries	534	569		3,321		1,157
Ending Balance	22,133	20,092		22,133		20,092
Commercial
Allowance for Loan Losses:
Beginning balance	14,144	11,448		10,987		12,119
Provision for loan losses	1,660	1,880		2,924	[2]	2,877	[3]
Loans charged off	(1,435)	(344)		(1,885)		(2,202)
Recoveries	162	206		2,505		396
Ending Balance	14,531	13,190		14,531		13,190
Residential
Allowance for Loan Losses:
Beginning balance	5,400	2,092		5,426		2,728
Provision for loan losses	303	582		500	[2]	1,265	[3]
Loans charged off	(4,127)	(572)		(4,399)		(1,908)
Recoveries	16	22		65		39
Ending Balance	1,592	2,124		1,592		2,124
Consumer
Allowance for Loan Losses:
Beginning balance	3,481	3,806		3,879		3,889
Provision for loan losses	611	670		844	[2]	989	[3]
Loans charged off	(811)	(1,073)		(1,837)		(1,856)
Recoveries	356	341		751		722
Ending Balance	3,637	3,744		3,637		3,744
Unallocated
Allowance for Loan Losses:
Beginning balance	2,247	967		1,666		506
Provision for loan losses	126	67		707	[2]	528	[3]
Loans charged off	0	0		0		0
Recoveries	0	0		0		0
Ending Balance	$ 2,373	$ 1,034		$ 2,373		$ 1,034

[1] * Provision before decrease of $1.41 million in 2012 for increase in FDIC indemnification asset

[2] Provision before increase of $1.01 million in 2013 for decrease in FDIC indemnification asset

[3] Provision before decrease of $914 thousand in 2012 for increase in FDIC indemnification asset