Restructuring (Details) - USD ($)	3 Months Ended				12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, beginning of period	$ 1,359,000	$ 1,977,000	$ 3,568,000	$ 3,305,000
Restructuring and Related Cost, Incurred Cost			905,000	1,112,000
Restructuring Reserve, Settled with Cash	(335,000)	(618,000)	(1,214,000)	(849,000)
Restructuring Reserve, end of period	1,024,000	1,359,000	3,259,000	3,568,000	$ 3,305,000
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, beginning of period	1,359,000	1,977,000	3,568,000	3,305,000
Restructuring and Related Cost, Incurred Cost			905,000	1,112,000
Restructuring Reserve, Settled with Cash	(335,000)	(618,000)	(1,214,000)	(849,000)
Restructuring Reserve, end of period	1,024,000	$ 1,359,000	3,259,000	3,568,000	3,305,000
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
Restructuring and Related Cost, Cost Incurred to Date	6,400,000
Restructuring and Related Cost, Expected Cost Remaining	$ 0