Business Combinations - Pro Forma Information (Details) - RidgeWorth - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Jun. 30, 2017
Actual results subsequent to closing date:
Total Revenues	$ 11,536
Restructuring and severance	8,396
All other operating expenses	8,564
Operating Income (Loss)	(5,424)
Income (Loss) Before Income Taxes	$ (5,398)
Pro Forma results:
Total Revenues		$ 119,803	$ 237,395
Net Income (Loss) Attributable to Common Stockholders		$ (2,724)	$ 9,982
Basic EPS (in dollars per share)		$ (0.39)	$ 1.47
Diluted EPS (in dollars per share)		$ (0.39)	$ 1.42