Derivatives and Hedging (Tables)

3 Months Ended

9 Months Ended

Dec. 31, 2012

Dec. 31, 2012

Derivatives And Hedging Disclosure [Abstract]

Derivative Instruments not Designated as Hedging Instruments

	December 31, 2012				March 31, 2012
	Assets		Liabilities		Assets		Liabilities
Currency forward contracts	$	242	$	635	$	38	$	685
Futures contracts	75		109		46		201
Total	$	317	$	744	$	84	$	886

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance

		Three months ended December 31,
		2012					2011
	Income Statement Classification	Gains		Losses			Gains		Losses
Currency forward contracts for:
Operating activities	Other expense	$	1,016	$	(1,250	)	$	3,628	$	(946	)
Seed capital investments	Other non-operating income (expense)	39		(401		)	270		(149		)
Futures contracts for seed capital investments	Other non-operating income (expense)	78		(986		)	198		(2,290		)
Total		$	1,133	$	(2,637	)	$	4,096	$	(3,385	)

		Nine months ended December 31,
		2012					2011
	Income Statement Classification	Gains		Losses			Gains		Losses
Currency forward contracts for:
Operating activities	Other expense	$	1,543	$	(1,564	)	$	6,869	$	(2,839	)
Seed capital investments	Other non-operating income (expense)	98		(453		)	447		(93		)
Futures contracts for seed capital investments	Other non-operating income (expense)	1,230		(2,584		)	5,669		(2,196		)
Total		$	2,871	$	(4,601	)	$	12,985	$	(5,128	)