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Related Party Transactions	3 Months Ended
Related Party Transactions	Mar. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions A prior owner of one of the Company’s Affiliates retained an interest in certain of the Affiliate’s private equity investment partnerships. The prior owner’s interest is presented in the Company’s Consolidated Balance Sheets as either a liability in Other liabilities or as Non-controlling interests, depending on the structure of the prior owner’s investments in the partnerships. The total liability was $67.8 million and $66.9 million at December 31, 2016 and March 31, 2017, respectively. The total non-controlling interest was $2.5 million and $2.1 million at December 31, 2016 and March 31, 2017, respectively. In certain cases, Affiliate management owners and Company officers may serve as trustees or directors of certain investment vehicles from which an Affiliate earns advisory fee revenue. The Company has liabilities to related parties for contingent payment arrangements in connection with certain business combinations. The total amounts payable were $8.6 million and $8.9 million as of December 31, 2016 and March 31, 2017, respectively, and were included in Other liabilities. The Company has related party transactions in association with its Affiliate equity transactions, as more fully described in Notes 11 and 12