Quarterly report pursuant to Section 13 or 15(d)

DEBT (Details)

v3.3.0.814
DEBT (Details)
 6 Months Ended
Oct. 05, 2015
USD ($)
Sep. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Sep. 30, 2014
Debt Instrument [Line Items]        
Restricted cash   $ 19,042,000 $ 2,621,000  
Wells Fargo Credit Agreement        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing amount   $ 75,000,000    
Fixed charge coverage ratio required to repay 3.50% convertible subordinated notes   1.5    
Amount of liquidity required to repay 3.50% subordinated convertible notes   $ 25,000,000    
Line of Credit Facility, Maximum Borrowing After Letters of Credit   $ 74,000,000.0    
Line of credit facility, frequency of commitment fee payment   Quarterly    
Line of credit facility, percent commitment fee on undrawn amounts   0.375%    
Minimum percent of debt holders required to give written notice of default   25.00%    
Line of credit facility, average liquidity when covenant is applied   15,000,000.0    
Line of credit, minimum liquidity at all times when covenant is applied   $ 10,000,000    
Line of credit, liquidity amount that must be excess availability   $ 5,000,000    
Line of credit facility, fixed charge coverage ratio   1.2    
Line of credit facility, fixed charge coverage ratio, period when covenant is applied   12 months    
Amount of borrowings, if exceeded, increase the filing of compliance certificates to monthly rather than quarterly   $ 5,000,000.0    
Line of credit facility, amount of liquidity required to avoid audits   20,000,000.0    
Wells Fargo Credit Agreement | Letter of Credit        
Debt Instrument [Line Items]        
Line of credit facility, letters of credit outstanding   $ 1,000,000    
3.50% convertible subordinated notes        
Debt Instrument [Line Items]        
Stated interest rate   3.50%   3.50%
Restricted cash   $ 16,300,000    
3.50% convertible subordinated notes | Subsequent Event        
Debt Instrument [Line Items]        
Debt Instrument, Repurchased Face Amount $ 81,000,000      
Debt Instrument, Repurchase Amount 82,400,000      
Debt Instrument, Periodic Payment, Interest 1,100,000      
Gains (Losses) on Extinguishment of Debt 400,000      
Gains (Losses) on Extinguishment of Debt, before Write off of Deferred Debt Issuance Cost 300,000      
Write off of Deferred Debt Issuance Cost 100,000      
Repayments of convertible debt 66,100,000      
3.50% convertible subordinated notes | Subsequent Event | Cash        
Debt Instrument [Line Items]        
Repayments of convertible debt $ 16,300,000