Goodwill and Other Intangibles Narrative (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 5,804	$ 5,094	$ 5,618
Impairment of amortizable intangibles	(357)
Enterprise Resource Planning System [Member]
Finite-Lived Intangible Assets [Line Items]
Capitalized Computer Software, Net	15,942
Finite-lived intangible assets, useful life	5
Impairment of amortizable intangibles	642
Internally Developed Software Intangible [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	3,024	2,913
Impairment of amortizable intangibles	$ (357)