Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015
Allowance for Loan Losses:
Beginning balance	$ 19,926		$ 19,351		$ 19,946		$ 18,839
Provision for loan losses	435	[1]	1,150	[2]	1,270	[1]	2,600	[2]
Loans charged off	(1,842)		(1,479)		(3,482)		(3,302)
Recoveries	985		839		1,770		1,724
Ending Balance	19,504		19,861		19,504		19,861
Commercial Portfolio Segment [Member]
Allowance for Loan Losses:
Beginning balance	11,168		10,818		11,482		10,915
Provision for loan losses	(816)	[1]	160	[2]	(1,091)	[1]	167	[2]
Loans charged off	(555)		(272)		(822)		(608)
Recoveries	447		225		675		457
Ending Balance	10,244		10,931		10,244		10,931
Residential Portfolio Segment [Member]
Allowance for Loan Losses:
Beginning balance	1,769		1,622		1,834		1,374
Provision for loan losses	(22)	[1]	277	[2]	103	[1]	653	[2]
Loans charged off	(232)		(181)		(471)		(406)
Recoveries	80		42		129		139
Ending Balance	1,595		1,760		1,595		1,760
Consumer Portfolio Segment [Member]
Allowance for Loan Losses:
Beginning balance	5,106		4,494		4,945		4,370
Provision for loan losses	749	[1]	638	[2]	1,536	[1]	1,468	[2]
Loans charged off	(1,055)		(1,026)		(2,189)		(2,288)
Recoveries	458		572		966		1,128
Ending Balance	5,258		4,678		5,258		4,678
Unallocated
Allowance for Loan Losses:
Beginning balance	1,883		2,417		1,685		2,180
Provision for loan losses	524	[1]	75	[2]	722	[1]	312	[2]
Loans charged off	0		0		0		0
Recoveries	0		0		0		0
Ending Balance	$ 2,407		$ 2,492		$ 2,407		$ 2,492

[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOmU5YjdkNzY3MjQ2MDRhMjZhNWQwYzRmYjM3OGY3MGYwfFRleHRTZWxlY3Rpb246RDlCNEE5NDM1RTFBMThFMzA4QUQ5NUIwREFCRkZDN0YM}

[2] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOmU5YjdkNzY3MjQ2MDRhMjZhNWQwYzRmYjM3OGY3MGYwfFRleHRTZWxlY3Rpb246RTNDM0ZBQzEwMDVGQ0MwMDNCMDA5NUIwREFCRjYwQ0YM}