Annual report pursuant to Section 13 and 15(d)

Acquisitions Acquisitions (Details)

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Acquisitions Acquisitions (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Mar. 02, 2014
CSI [Member]
Business Acquisition [Line Items]        
BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAcquired       $ 6,513
Business Combination, Acquired Receivables, Fair Value       2,920
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory       7,625
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets       158
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment       816
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill       16,230
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable       (2,875)
BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIncomeTaxPayable       (1,175)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent (9,100)     (6,616)
Goodwill 30,697 0 801 20,142
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest       $ 43,738