Fair Value Measurements (Details) (Recurring basis, USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Mar. 31, 2014
Fair Value
Assets (Liabilities) at fair value
Nonqualified deferred compensation assets	$ 5,051	$ 4,534
Nonqualified deferred compensation liability	(5,051)	(4,534)
Designated derivatives assets	1,038
Non-designated derivatives assets	3,433
Contingent consideration for acquisition of business	(27,500)	(30,000)
Designated derivatives liability		(832)
Level 1
Assets (Liabilities) at fair value
Nonqualified deferred compensation assets	5,051	4,534
Nonqualified deferred compensation liability	(5,051)	(4,534)
Designated derivatives assets	0
Non-designated derivatives assets	0
Contingent consideration for acquisition of business	0	0
Designated derivatives liability		0
Level 2
Assets (Liabilities) at fair value
Nonqualified deferred compensation assets	0	0
Nonqualified deferred compensation liability	0	0
Designated derivatives assets	1,038
Non-designated derivatives assets	3,433
Contingent consideration for acquisition of business	0	0
Designated derivatives liability		(832)
Level 3
Assets (Liabilities) at fair value
Nonqualified deferred compensation assets	0	0
Nonqualified deferred compensation liability	0	0
Designated derivatives assets	0
Non-designated derivatives assets	0
Contingent consideration for acquisition of business	(27,500)	(30,000)
Designated derivatives liability		$ 0