Business Combination - Pro Forma Information (Details) - RidgeWorth - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		4 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Actual results subsequent to closing date:
Total Revenues	$ 32,478		$ 44,014
Restructuring and severance	1,453		9,849
All other operating expenses	23,685		32,249
Operating Income (Loss)	1,648		(3,776)
Income (Loss) Before Income Taxes	$ 5,446		$ 48
Pro forma results:
Total Revenues		$ 118,010		$ 361,070	$ 349,091
Net Income		$ 13,696		$ 29,975	$ 19,759
Basic EPS (in dollars per share)		$ 1.74		$ 3.42	$ 2.39
Diluted EPS (in dollars per share)		$ 1.70		$ 3.31	$ 2.34