Business Combinations - Assets Acquired and Liabilities & Equity Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jul. 01, 2018	Dec. 31, 2017	Jun. 01, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets:
Goodwill	$ 290,366		$ 170,153		$ 6,788	$ 6,701
Sustainable Growth Advisers, LP
Assets:
Cash and cash equivalents		$ 2,505
Investments		262
Accounts receivable		6,649
Furniture, equipment and leasehold improvements		70
Intangible assets		62,000
Goodwill		120,213
Other assets		659
Total Assets		192,358
Liabilities:
Accrued compensation and benefits		824
Accounts payable and accrued liabilities		6,534
Noncontrolling Interests of CIP		55,500
Total liabilities		7,358
Total Net Assets Acquired		$ 129,500
RidgeWorth
Assets:
Accounts receivable				$ 20,311
Furniture, equipment and leasehold improvements				5,505
Intangible assets				275,700
Goodwill				163,365
Deferred taxes, net				6,590
Total Assets				1,476,026
Liabilities:
Accrued compensation and benefits				18,263
Accounts payable and accrued liabilities				11,858
Other liabilities				2,601
Noncontrolling Interests of CIP				16,181
Total Liabilities & Noncontrolling Interests				928,944
Total Net Assets Acquired				547,082
Consolidated Entity Excluding Variable Interest Entities (VIE) | RidgeWorth
Assets:
Cash and cash equivalents				39,343
Investments				5,516
Other assets				3,003
Consolidated investment products | RidgeWorth
Assets:
Cash and cash equivalents				38,261
Investments				899,274
Other assets				19,158
Liabilities:
Notes payable of CIP				770,160
Securities purchased payable and other liabilities of CIP				$ 109,881