Reportable Segments Segments Text Disclosures (Details) $ in Thousands	1 Months Ended		3 Months Ended								12 Months Ended
	Dec. 31, 2018 USD ($) affiliate market	Apr. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) affiliate market	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) affiliate segment market	Dec. 31, 2017 USD ($) segment	Dec. 31, 2016 USD ($)	Jan. 01, 2018 affiliate
Segment Reporting Information [Line Items]
Number of reportable segments | segment											3	4
Number of segments combined | segment												2
Restructuring expense											$ 7,828	$ 0	$ 2,017
Impairment of goodwill							$ 24,900				0	24,901	9,528
Gain/ (loss) on sale of affiliates or offices											18,142	(1,264)	2,862
Net income from discontinued operations			$ 306	$ 0	$ (2)	$ 1,698	$ 989	$ 1,186	$ 1,063	$ 1,632	$ 2,002	4,870	5,541
Gain (loss) on sale of properties, applicable income taxes	$ 3,500	$ 12,700
Private Banking
Segment Reporting Information [Line Items]
Number of geographic markets | market	3		3								3
Restructuring expense											$ 6,600
Impairment of goodwill												0
Wealth Management and Trust
Segment Reporting Information [Line Items]
Restructuring expense											$ 400		2,000
Impairment of goodwill												0	9,500
Affiliate Partners (4)
Segment Reporting Information [Line Items]
Number of consolidated entities | affiliate	4		4								4
Restructuring expense											$ 800
Impairment of goodwill												24,901
Investment Management
Segment Reporting Information [Line Items]
Number of consolidated entities | affiliate														2
Wealth Advisory
Segment Reporting Information [Line Items]
Number of consolidated entities | affiliate	2		2								2
Holding Company and Eliminations
Segment Reporting Information [Line Items]
Gain/ (loss) on sale of affiliates or offices											$ 18,100	(1,300)
Net income from discontinued operations											$ 2,002	$ 4,870	$ 5,541