Restructuring (Details) - USD ($)	3 Months Ended		12 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			$ 2,017,000	$ 3,724,000	$ 739,000
Restructuring and Related Cost, Cost Incurred to Date			6,400,000
Restructuring Reserve			1,977,000	3,305,000	739,000	$ 33,000
Restructuring Reserve, Settled with Cash			(3,345,000)	(1,158,000)	(33,000)
Restructuring and Related Cost, Expected Cost			0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			2,017,000	3,434,000	739,000
Restructuring Reserve			1,977,000	3,305,000	739,000	33,000
Restructuring Reserve, Settled with Cash			(3,345,000)	(868,000)	(33,000)
Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			0	290,000	0
Restructuring Reserve			0	0	0	$ 0
Restructuring Reserve, Settled with Cash			$ 0	(290,000)	0
Banyan Acquisition and WMT Management Restructuring Plan [Member] | Wealth Management and Trust Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 900,000	$ 1,100,000		$ 3,700,000	$ 700,000