Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2015		Jun. 30, 2014
Allowance for Loan Losses:
Beginning balance	$ 19,351		$ 20,408		$ 18,839		$ 20,068
Provision for loan losses	1,150	[1]	(820)	[2]	2,600	[1]	905	[2]
Loans charged off	(1,479)		(2,325)		(3,302)		(4,486)
Recoveries	839		992		1,724		1,768
Ending Balance	19,861		18,255		19,861		18,255
Commercial
Allowance for Loan Losses:
Beginning balance	10,818		12,453		10,915		12,450
Provision for loan losses	160	[1]	(1,051)	[2]	167	[1]	(319)	[2]
Loans charged off	(272)		(710)		(608)		(1,646)
Recoveries	225		158		457		365
Ending Balance	10,931		10,850		10,931		10,850
Residential
Allowance for Loan Losses:
Beginning balance	1,622		1,581		1,374		1,585
Provision for loan losses	277	[1]	(54)	[2]	653	[1]	12	[2]
Loans charged off	(181)		(633)		(406)		(805)
Recoveries	42		480		139		582
Ending Balance	1,760		1,374		1,760		1,374
Consumer
Allowance for Loan Losses:
Beginning balance	4,494		3,864		4,370		3,650
Provision for loan losses	638	[1]	533	[2]	1,468	[1]	1,333	[2]
Loans charged off	(1,026)		(982)		(2,288)		(2,035)
Recoveries	572		354		1,128		821
Ending Balance	4,678		3,769		4,678		3,769
Unallocated
Allowance for Loan Losses:
Beginning balance	2,417		2,510		2,180		2,383
Provision for loan losses	75	[1]	(248)	[2]	312	[1]	(121)	[2]
Loans charged off	0		0		0		0
Recoveries	0		0		0		0
Ending Balance	$ 2,492		$ 2,262		$ 2,492		$ 2,262

[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOmY3NGExYWQ5YWUxMDRiZGQ4ZmNiMDc4MDI1MmVjOGE3fFRleHRTZWxlY3Rpb246RDkxRjAxRDE2QTVFRDk3QjBFOUE0M0ZFRjQxNDE2RTQM}

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