Fair Values of Assets and Liabilities (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014		Mar. 31, 2014
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Assets valued using net asset value as practical expedient - Level 2	33.00%		31.00%
Assets at fair value using net asset as practical expedient - Level 3	67.00%		69.00%
Funds-Of-Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of Monthly Redemption	30.00%		40.00%
Percentage of Quarterly Redemption	70.00%		60.00%
Other Investments [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of Redemption, Investment Funds, With Less Than One Year	11.00%
Percentage of Investment of 19 Year Redemption	89.00%
Consolidated Entity Excluding Consolidated Investment Vehicles Before Eliminations [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Alternative Investments Fair Value Disclosure	$ 73,380	[1]	$ 79,425	[1]
Unfunded Commitments	25,262
Consolidated Entity Excluding Consolidated Investment Vehicles Before Eliminations [Member] | Funds-Of-Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Alternative Investments Fair Value Disclosure	29,471	[2]	34,771	[2]
Consolidated Entity Excluding Consolidated Investment Vehicles Before Eliminations [Member] | Hedge Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Alternative Investments Fair Value Disclosure	18,828		19,461
Unfunded Commitments	20,000
Consolidated Entity Excluding Consolidated Investment Vehicles Before Eliminations [Member] | Private Equity Funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Alternative Investments Fair Value Disclosure	22,911	[3]	22,759	[3]
Unfunded Commitments	5,262
Investments Remaining Term, High End of Range	8.0 years
Consolidated Entity Excluding Consolidated Investment Vehicles Before Eliminations [Member] | Other Investments [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Alternative Investments Fair Value Disclosure	$ 2,170	[4]	$ 2,434	[4]
Investments Remaining Term, Category One	1 year 0 months
Investments Remaining Term, Category Two	19 years 0 months

[1] Comprised of approximately 33% and 67% of Level 2 and Level 3 assets, respectively, as of June 30, 2014 and 31% and 69% of Level 2 and Level 3 assets, respectively, as of March 31, 2014.

[2] 30% monthly redemption and 70% quarterly redemption as of June 30, 2014. 40% monthly redemption and 60% quarterly redemption as of March 31, 2014. All lockups expired in June 2013.

[3] Liquidations are expected over the remaining term.

[4] Of this balance, 11% has a remaining term of less than one year and 89% has a remaining term of 19 years.