Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2012	Mar. 31, 2012
Goodwill [Roll Forward]
Opening Balance	$ 106,435
Goodwill Translation Adjustments	(876)
Closing Balance	105,559
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	21,106	21,858
Accumulated Amortization	(6,784)	(6,067)
Net	14,322	15,791
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,574	5,783
Accumulated Amortization	(1,222)	(1,109)
Net	4,352	4,674
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	14,251	14,808
Accumulated Amortization	(5,235)	(4,693)
Net	9,016	10,115
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,281	1,267
Accumulated Amortization	(327)	(265)
Net	$ 954	$ 1,002