Significant Accounting Policies Consolidation (Details) $ in Thousands	9 Months Ended		12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015	Mar. 31, 2016
Variable Interest Entity
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 16,025
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	$ 2,680
Variable Interest Entity, Number of Collateralized Securites Vehicles		3
Variable Interest Entity, Primary Beneficiary, Number of Collateralized Securites Vehicles			0
Number of Sponsored Investment Fund Vie	6		1
Employee Owned Funds	1	14	14
Consolidated Investment Vehicles [Member]
Variable Interest Entity
Redeemable Noncontrolling Interest, Equity, Other, Carrying Amount	$ 18,818