Annual report pursuant to Section 13 and 15(d)

Redeemable Noncontrolling Interests (Details)

v3.8.0.1
Redeemable Noncontrolling Interests (Details) - fund
Dec. 31, 2017
Dec. 31, 2016
Noncontrolling Interest [Abstract]    
Number of funds, carrying value adjusted to redemption value 6 4