Non-controlling Interests (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Variable Interest Entity [Line Items]
Net (loss) income of consolidated entities attributable to non-controlling interests	$ (5,748)	$ 1,275
Non-redeemable non-controlling interests in consolidated entities	17,622		$ 24,473
Redeemable non-controlling interest	217,700		13,203
CPH acquisition
Variable Interest Entity [Line Items]
Redeemable non-controlling interest	13,203		13,203
Consolidated private equity fund
Variable Interest Entity [Line Items]
Net (loss) income of consolidated entities attributable to non-controlling interests	0	1,137
Non-redeemable non-controlling interests in consolidated entities	0		23,171
Other
Variable Interest Entity [Line Items]
Net (loss) income of consolidated entities attributable to non-controlling interests	100	138
Non-redeemable non-controlling interests in consolidated entities	1,453		1,302
Consolidated VIEs
Variable Interest Entity [Line Items]
Net (loss) income of consolidated entities attributable to non-controlling interests	(5,848)	$ 0
Non-redeemable non-controlling interests in consolidated entities	16,169		0
Redeemable non-controlling interest	$ 204,497		$ 0