Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2016		Sep. 30, 2015
Allowance for Loan Losses:
Beginning balance	$ 19,504		$ 19,861		$ 19,946		$ 18,839
Provision for loan losses	1,091	[1]	1,050	[2]	2,361	[1]	3,650	[2]
Loans charged off	(2,724)		(3,295)		(6,206)		(6,597)
Recoveries	1,203		2,309		2,973		4,033
Ending Balance	19,074		19,925		19,074		19,925
Commercial Portfolio Segment [Member]
Allowance for Loan Losses:
Beginning balance	10,244		10,931		11,482		10,915
Provision for loan losses	571	[1]	1,338	[2]	(520)	[1]	1,505	[2]
Loans charged off	(1,029)		(1,874)		(1,851)		(2,482)
Recoveries	479		1,694		1,154		2,151
Ending Balance	10,265		12,089		10,265		12,089
Residential Portfolio Segment [Member]
Allowance for Loan Losses:
Beginning balance	1,595		1,760		1,834		1,374
Provision for loan losses	40	[1]	158	[2]	143	[1]	811	[2]
Loans charged off	(211)		(220)		(682)		(626)
Recoveries	154		196		283		335
Ending Balance	1,578		1,894		1,578		1,894
Consumer Portfolio Segment [Member]
Allowance for Loan Losses:
Beginning balance	5,258		4,678		4,945		4,370
Provision for loan losses	1,275	[1]	1,052	[2]	2,811	[1]	2,520	[2]
Loans charged off	(1,484)		(1,201)		(3,673)		(3,489)
Recoveries	570		419		1,536		1,547
Ending Balance	5,619		4,948		5,619		4,948
Unallocated
Allowance for Loan Losses:
Beginning balance	2,407		2,492		1,685		2,180
Provision for loan losses	(795)	[1]	(1,498)	[2]	(73)	[1]	(1,186)	[2]
Loans charged off	0		0		0		0
Recoveries	0		0		0		0
Ending Balance	$ 1,612		$ 994		$ 1,612		$ 994

[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjMyNGFiYzQ4Y2E4MTQ0ZDBhN2YwNjkwZTE1OWYzM2UyfFRleHRTZWxlY3Rpb246RDAwNTgxOUI1MzEzMUEyNTYwQUEwNUUyQTMwRUY4MDMM}

[2] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjMyNGFiYzQ4Y2E4MTQ0ZDBhN2YwNjkwZTE1OWYzM2UyfFRleHRTZWxlY3Rpb246QUUyOTc4RTlFRDcxQThCQzBCNjkwNUUyQTMwRTgwQUYM}