Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details 2)

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Income Taxes (Details 2) (USD $)
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Annual activities included in the deferred tax valuation allowance      
Increase (decrease) in valuation allowance $ 20,000,000 $ 6,100,000 $ (19,000,000)
Change in net deferred income tax asset (liability)      
Balance at the beginning of the period 4,113,000    
Deferred income taxes related to operations 317,000    
Deferred income taxes related to other comprehensive income (396,000)    
Foreign currency translation (438,000)    
Balance at the end of the period 3,596,000 4,113,000  
Period of cumulative loss for determination of full valuation allowance 3 years    
Valuation Allowance for Deferred Tax Assets
     
Annual activities included in the deferred tax valuation allowance      
Balance at the beginning of the period 149,306,000 143,216,000 162,217,000
Benefit to costs and expenses 23,977,000 10,206,000 (11,623,000)
Deductions (4,013,000) (4,116,000) (7,378,000)
Balance at the end of the period $ 169,270,000 $ 149,306,000 $ 143,216,000