Related Party Transactions	12 Months Ended
Dec. 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 $61.2 million at December 31, 2016 and 2017, respectively. The total non-controlling interest was $2.5 million at December 31, 2016. The Company and its Affiliates earn asset and performance based fees, distribution and servicing and other fees and incur distribution and servicing and other expenses for services provided to Affiliate sponsored investment products. In addition, Affiliate management owners and Company officers may serve as trustees or directors of certain investment vehicles from which the Company or an Affiliate earns fees. The Company had liabilities to related parties for contingent payment arrangements in connection with certain business combinations. The net present value of the total amounts payable were $8.6 million and $9.4 million as of December 31, 2016 and 2017, respectively, and were included in Other liabilities. In 2016, there were no payments made associated with these liabilities. In 2017, the Company made $6.8 million in such payments. For the years ended December 31, 2016 and 2017, the Company adjusted its estimates of contingent payment obligations and recorded gains attributable to the controlling interest of $2.8 million and expenses from adjustments to its contingent payment obligations of $6.6 million, respectively. These amounts are included in Imputed interest expense and contingent payment arrangements. The Company has related party transactions in association with its Affiliate equity transactions, as more fully described in Notes 19 and 20.

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 $61.2 million at December 31, 2016 and 2017, respectively. The total non-controlling interest was $2.5 million at December 31, 2016.

The Company and its Affiliates earn asset and performance based fees, distribution and servicing and other fees and incur distribution and servicing and other expenses for services provided to Affiliate sponsored investment products. In addition, Affiliate management owners and Company officers may serve as trustees or directors of certain investment vehicles from which the Company or an Affiliate earns fees.

The Company had liabilities to related parties for contingent payment arrangements in connection with certain business combinations. The net present value of the total amounts payable were $8.6 million and $9.4 million as of December 31, 2016 and 2017, respectively, and were included in Other liabilities. In 2016, there were no payments made associated with these liabilities. In 2017, the Company made $6.8 million in such payments. For the years ended December 31, 2016 and 2017, the Company adjusted its estimates of contingent payment obligations and recorded gains attributable to the controlling interest of $2.8 million and expenses from adjustments to its contingent payment obligations of $6.6 million, respectively. These amounts are included in Imputed interest expense and contingent payment arrangements.

The Company has related party transactions in association with its Affiliate equity transactions, as more fully described in Notes 19 and 20.