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Accounts Receivable - Net (Details) (USD $)
 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
May 31, 2013
Fenco [Member]
Accounts Receivable - Net [Abstract]      
Accounts receivable - trade $ 58,766,000 $ 40,686,000  
Allowance for bad debts (854,000) (1,019,000)  
Customer allowances earned (9,088,000) (11,160,000)  
Customer payment discrepancies (577,000) (514,000)  
Customer returns RGA issued (5,809,000) (4,966,000)  
Customer core returns accruals (20,155,000) (19,338,000)  
Less: total accounts receivable offset accounts (36,483,000) (36,997,000)  
Total accounts receivable - net 22,283,000 3,689,000  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Accounts receivable - net, deconsolidated     4,377,000
Warranty Returns [Abstract]      
Warranty accrual included in customer returns RGA issued 2,407,000 1,807,000  
Warranty return estimate included in customer finished goods returns accrual 5,632,000 4,398,000  
Warranty return accrual, deconsolidated     5,642,000
Change in warranty return accrual [Roll Forward]      
Balance at beginning of period 6,205,000 4,426,000  
Charged to expense 56,284,000 48,948,000  
Amounts processed (54,450,000) (47,169,000)  
Balance at end of period $ 8,039,000 $ 6,205,000