REDEEMABLE INTERESTS AND EQUITY COMPENSATION PUT OPTION LIABILITY (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Jul. 31, 2016	Nov. 30, 2011	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Redeemable interests
Beginning balance			$ 23,988	$ 23,947
Distributions			(330,649)	(302,508)	$ (594,553)
Reallocation of Partners' capital for change in ownership interest			(881)	(82)	900
Ending Balance			23,505	23,988	23,947
Consolidated Funds
Redeemable interests
Beginning balance			23,505	23,988
Net income			456	338	567
Distributions			(661)	(998)	(477)
Currency translation adjustment			(47)	(36)	(16)
Equity compensation			84	132	81
Issuance cost			0	0	(124)
Allocation of contributions in excess of the carrying value of the net assets (dilution)			0	0	910
Reallocation of Partners' capital for change in ownership interest			0	82	(900)
Deferred tax liabilities arising from allocation of contribution and Partners' capital			0	(1)	0
Redemption of redeemable interest in consolidated subsidiary			(20,000)	0	0
Forfeiture of equity in connection with redemption of ownership interest			(3,337)	0	0
Ending Balance			0	23,505	23,988
AOG
Redeemable interests
Beginning balance			23,505	23,988	40,751
Net income			0	0	164
Distributions			0	0	(1,313)
Currency translation adjustment			0	0	9
Equity compensation			0	0	234
Tandem award compensation adjustment			$ 0	0	(15,898)
Ending Balance				$ 23,505	$ 23,988
Indicus
Redeemable interests
Equity interest awarded to former owners of acquired entity (as a percent)		1.00%
Percent of equity interest deemed consideration In acquisition		50.00%
Percentage of interest accounted for as equity compensation		50.00%
Equity interest put option strike price		$ 40,000
Put option	$ 40,000	20,000
Put option liability	20,000	(20,000)
Non-controlling interest	20,000
Reclassifications to permanent equity	$ 3,300
Indicus | AOG
Redeemable interests
Put option		$ 20,000