Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Allowance for Loan Losses:
Beginning balance	$ 20,408		$ 25,272		$ 20,068		$ 21,958
Provision for loan losses	(820)	[1]	2,700	[2]	905	[3]	4,975	[4]
Loans charged off	(2,325)		(6,373)		(4,486)		(8,121)
Recoveries	992		534		1,768		3,321
Ending Balance	18,255		22,133		18,255		22,133
Commercial
Allowance for Loan Losses:
Beginning balance	12,453		14,144		12,450		10,987
Provision for loan losses	(1,051)	[1]	1,660	[2]	(319)	[3]	2,924	[4]
Loans charged off	(710)		(1,435)		(1,646)		(1,885)
Recoveries	158		162		365		2,505
Ending Balance	10,850		14,531		10,850		14,531
Residential
Allowance for Loan Losses:
Beginning balance	1,581		5,400		1,585		5,426
Provision for loan losses	(54)	[1]	303	[2]	12	[3]	500	[4]
Loans charged off	(633)		(4,127)		(805)		(4,399)
Recoveries	480		16		582		65
Ending Balance	1,374		1,592		1,374		1,592
Consumer
Allowance for Loan Losses:
Beginning balance	3,864		3,481		3,650		3,879
Provision for loan losses	533	[1]	611	[2]	1,333	[3]	844	[4]
Loans charged off	(982)		(811)		(2,035)		(1,837)
Recoveries	354		356		821		751
Ending Balance	3,769		3,637		3,769		3,637
Unallocated
Allowance for Loan Losses:
Beginning balance	2,510		2,247		2,383		1,666
Provision for loan losses	(248)	[1]	126	[2]	(121)	[3]	707	[4]
Loans charged off	0		0
Recoveries	0		0
Ending Balance	$ 2,262		$ 2,373		$ 2,262		$ 2,373

[1] Provision before increase of $464 thousand in 2014 for decrease in FDIC indemnification asset

[2] Provision before increase of $260 thousand in 2013 for decrease in FDIC indemnification asset

[3] Provision before increase of $699 thousand in 2014 for decrease in FDIC indemnification asset

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