Amount used to represent the attrition when calculating the fair value of amortizable asset management contracts

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

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Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Percentage of assumed long-term growth in revenues, used as an input to measure fair value.

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Acquisitions QS Investors Acquisition - Fair Value Assumptions (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2016	Dec. 31, 2014	Mar. 31, 2016	Mar. 31, 2015	May 30, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Business Combination, Contingent Consideration, Liability	$ 62,923		$ 84,585	$ 110,784
Business Combination, Contingent Consideration, Liability, Current	13,353
QS Investors [Domain]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Business Combination, Contingent Consideration, Liability	13,800		13,749	$ 13,553	$ 13,370
Business Combination, Contingent Consideration, Liability, Current	6,559
Fund management contracts [Member] \| QS Investors [Domain]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		10 years
Fair Value, Inputs, Level 3 [Member] \| Fund management contracts [Member] \| QS Investors [Domain]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Attrition Rate		(10.00%)
Fair Value Inputs, Discount Rate		15.00%
Fair Value, Inputs, Level 3 [Member] \| Contingent Consideration Liability \| QS Investors [Domain] \| Contingent payment due on second anniversary of acquisition
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Discount Rate		1.20%
Fair Value, Inputs, Level 3 [Member] \| Contingent Consideration Liability \| QS Investors [Domain] \| Contingent payment due on fourth anniversary of acquisition [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Discount Rate		2.10%
Minimum [Member] \| Fair Value, Inputs, Level 3 [Member] \| Contingent Consideration Liability \| QS Investors [Domain]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate		0.00%
Maximum [Member] \| Fair Value, Inputs, Level 3 [Member] \| Contingent Consideration Liability \| QS Investors [Domain]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate		10.00%
Weighted Average [Member] \| Fair Value, Inputs, Level 3 [Member] \| Contingent Consideration Liability \| QS Investors [Domain]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate		6.00%
Other changes in Fair Value [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	(3,662)		2,484
Other changes in Fair Value [Member] \| QS Investors [Domain]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 51		$ 196