Derivatives and Hedging Derivative Instruments and Hedging Activities Disclosure (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2016	Mar. 31, 2016
Derivative
Derivative, Term of Contract	4 years 245 days
Derivative, Average Remaining Maturity	4 months
Other Assets [Member]
Derivative
Amount Net for Fair Value of Derivative Assets and (Liabilities)	$ 836	$ 8,650
Other Liabilities [Member]
Derivative
Amount Net for Fair Value of Derivative Assets and (Liabilities)	7,047	$ 18,079
Foreign Exchange Forward [Member]
Derivative
Derivative, Notional Amount	152,768
Future [Member]
Derivative
Derivative, Notional Amount	$ 121,723