The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of amortization expense expected to be recognized after the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended								6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Tradenames [Member]	Mar. 31, 2012 Tradenames [Member]	Sep. 30, 2012 Acquired technology [Member]	Mar. 31, 2012 Acquired technology [Member]	Sep. 30, 2012 Total Intangible Assets [Member]	Mar. 31, 2012 Total Intangible Assets [Member]	Sep. 30, 2012 Asia [Member]	Sep. 30, 2012 South America [Member]	Sep. 30, 2012 Commercial Products [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance			$ 29,933								$ 520	$ 13,498	$ 15,915
Acquisition			783								0	0	783
Fluctuations in foreign currency			(1,189)								0	(1,323)	134
Goodwill, Ending Balance	29,527		29,527								520	12,175	16,832
Amortized intangible assets [Abstract]
Gross Carrying Value					9,955	10,387	3,477	0	13,432	10,387
Accumulated Amortization					(4,511)	(4,582)	(18)	0	(4,529)	(4,582)
Intangible Assets, Net					5,444	5,805	3,459	0	8,903	5,805
Amortization Expense	167	152	317	311
Amortization expense, fiscal year maturity [Abstract]
Remainder of 2013	400		400
2014	795		795
2015	1,111		1,111
2016	1,208		1,208
2017	1,266		1,266
2018 & Beyond	$ 4,123		$ 4,123