Changes in Level 3 Assets and Liabilities of CIVs (Details 5) - CIVs - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
ASSETS:
Assets measured at fair value using significant unobservable inputs, value at beginning of period		$ 48,620		$ 49,698
Purchases		5,957		7,422
Sales		(3,439)		(8,019)
Redemptions/Settlements/Other		0		0
Transfers, Net		0		0
Realized and unrealized gains/(losses), net		(2,429)		(392)
Assets measured at fair value using significant unobservable inputs, value at end of period		48,709		48,709
Fair Value Disclosures [Abstract]
Total realized and unrealized gains (losses), net				(392)
Unrealized gains (losses) on Level 3 assets and liabilities still held at the reporting date	$ (1,027)	(2,012)	$ (2,029)	(682)
Hedge Funds
ASSETS:
Assets measured at fair value using significant unobservable inputs, value at beginning of period	12,390	16,391	14,093	17,888
Purchases	93	37	248	489
Sales	(654)	(894)	(1,062)	(3,077)
Redemptions/Settlements/Other	0	0	0	0
Transfers, Net	0	0	(526)	0
Realized and unrealized gains/(losses), net	(1,051)	(353)	(1,975)	(119)
Assets measured at fair value using significant unobservable inputs, value at end of period	$ 10,778	15,181	$ 10,778	15,181
Private Equity Funds
ASSETS:
Assets measured at fair value using significant unobservable inputs, value at beginning of period		32,229		31,810
Purchases		5,920		6,933
Sales		(2,545)		(4,942)
Redemptions/Settlements/Other		0		0
Transfers, Net		0		0
Realized and unrealized gains/(losses), net		(2,076)		(273)
Assets measured at fair value using significant unobservable inputs, value at end of period		33,528		33,528
Collateralized Debt Obligations [Member]
LIABILITIES:
Liabilities measured at fair value using significant unobservable inputs, value at beginning of period				(79,179)
Purchases				0
Sales				0
Redemptions/Settlements/Other				79,179
Transfers, Net				0
Realized and unrealized gains/(losses), net				0
Liabilities measured at fair value using significant unobservable inputs, value at end of period		$ 0		$ 0