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Debt - (Additional Information) (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jul. 17, 2015
Jul. 08, 2014
Oct. 02, 2016
Sep. 27, 2015
Oct. 02, 2016
Sep. 27, 2015
Mar. 31, 2015
Mar. 31, 2016
Apr. 23, 2015
Debt Instrument [Line Items]                  
Payment of principal and accreted interest on Convertible Notes $ 172,388,000       $ 0 $ 172,266,000      
Number of shares issued from conversion 1,889,431                
Short-term debt     $ 21,731,000   $ 21,731,000     $ 22,144,000  
Short-term Debt, Weighted Average Interest Rate     8.00%   8.00%        
Company Owned Capital Stock Percentage Securing Senior Secured Credit Facility             65.00%    
Payments of Financing Costs         $ 0 4,971,000      
Amortization of Other Deferred Charges     $ 347,000 $ 341,000 694,000 $ 774,000      
Deferred Finance Costs, Net     5,585,000   5,585,000     6,279,000  
Senior Unsecured Five Point Zero Percentage Convertible Notes Due Two Thousand And Twenty Eight [Member]                  
Debt Instrument [Line Items]                  
Long-term debt     $ 300,000,000   $ 300,000,000     $ 300,000,000 $ 300,000,000
Debt Instrument Interest Rate     5.00%   5.00%     5.00%  
Convertible Notes Payable                  
Debt Instrument [Line Items]                  
Available lines of credit     $ 473,101,000   $ 473,101,000     $ 472,187,000  
Outstanding amount     145,026,000   145,026,000     144,112,000  
Stand by letters of credit     4,070,000   4,070,000     2,693,000  
Incremental Commitment Agreement | Secured Debt | 2011 Credit Facility due 2018                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Incremental Term Loan Commitment     305,000,000   305,000,000     312,500,000  
Incremental Commitment Agreement | Revolving Commitments and/or Term Loans                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Increase in Borrowing Capacity Limit   $ 300,000,000              
Incremental Commitment Agreement | Line of Credit | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Maximum Borrowing Capacity   500,000,000              
Incremental Commitment Agreement | Secured Debt                  
Debt Instrument [Line Items]                  
Long-term debt     170,000,000   170,000,000        
Incremental Commitment Agreement | Secured Debt | Secured Debt                  
Debt Instrument [Line Items]                  
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months               $ 15,000,000  
Line of Credit Facility, Maximum Borrowing Capacity   $ 150,000,000              
Incremental Commitment Agreement | Secured Debt | Secured Debt | 2011 Credit Facility due 2018                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Incremental Term Loan Commitment     $ 135,000,000   $ 135,000,000        
LIBOR | Incremental Commitment Agreement | Revolving Commitments and/or Term Loans | Minimum                  
Debt Instrument [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate   1.25%              
LIBOR | Incremental Commitment Agreement | Revolving Commitments and/or Term Loans | Maximum                  
Debt Instrument [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate   1.75%              
Base Rate | Incremental Commitment Agreement | Revolving Commitments and/or Term Loans | Minimum                  
Debt Instrument [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate   0.25%              
Base Rate | Incremental Commitment Agreement | Revolving Commitments and/or Term Loans | Maximum                  
Debt Instrument [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate   0.75%              
Debt Instrument Quarterly Installments Beginning June 30, 2014 through June 30, 2016 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Periodic Payment   $ 1,875,000              
Debt Instrument Quarterly Installments Beginning June 30, 2016 through September 30, 2018 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Periodic Payment   3,750,000              
Debt Instrument Final Installments Payable on September 30, 2018 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Periodic Payment   $ 108,750,000