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Debt (Details Textual)
$ in Thousands
12 Months Ended
Apr. 15, 2014
USD ($)
Apr. 02, 2016
USD ($)
Mar. 28, 2015
USD ($)
Mar. 29, 2014
USD ($)
Mar. 30, 2013
USD ($)
Nov. 19, 2015
USD ($)
Oct. 03, 2015
Apr. 07, 2015
USD ($)
Apr. 30, 2007
USD ($)
Debt Instrument [Line Items]                  
Interest Costs Capitalized   $ 5,200              
Unamortized Debt Issuance Expense   11,870              
Interest paid   2,164 $ 930 $ 1,205          
Loss on retirement of convertible subordinated notes         $ 2,800        
Net carrying amount of debt   988,130              
Repayment of long term debt   175,000 $ 87,503 0          
Senior Notes [Member]                  
Debt Instrument [Line Items]                  
Interest Expense, Borrowings   $ 25,800              
Default interest rate increase   0.25%              
Default interest rate increase increments   0.25%              
Maximum default interest rate increase   1.00%              
6.75% Senior Notes due 2023 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount           $ 450,000      
Debt Instrument, Interest Rate, Stated Percentage   6.75%              
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed   35.00%              
Debt Instrument, Redemption Price, Percentage   106.75%              
Long-term Debt, Fair Value   $ 465,800              
Net carrying amount of debt   $ 450,000              
7.00% Senior Notes due 2025 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount           $ 550,000      
Debt Instrument, Interest Rate, Stated Percentage   7.00%              
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed   35.00%              
Debt Instrument, Redemption Price, Percentage   107.00%              
Long-term Debt, Fair Value   $ 581,600              
Net carrying amount of debt   550,000              
Convertible Notes Due 2012 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount                 $ 200,000
Debt Instrument, Interest Rate, Stated Percentage                 0.75%
Repayments of Convertible Debt         26,500        
Convertible Notes Due 2014 [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Face Amount                 $ 175,000
Debt Instrument, Interest Rate, Stated Percentage                 1.00%
Repayments of Convertible Debt $ 87,500       $ 47,400        
Interest paid $ 400                
Interest Expense, Debt, Excluding Amortization       900          
Amortization of Debt Discount (Premium)       $ 5,200          
Debt Instrument, Interest Rate, Effective Percentage       7.20%          
Bank of America Syndicate [Member] | Revolving Credit Facility [Member] | Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Maximum Borrowing Capacity               $ 300,000  
Line of Credit Facility, Maximum amount of increase that may be requested               150,000  
Proceeds from Lines of Credit   $ 175,000              
Bank of America Syndicate [Member] | Standby Letters of Credit [Member] | Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Maximum Borrowing Capacity               25,000  
Bank of America Syndicate [Member] | Swingline Loan [Member] | Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Maximum Borrowing Capacity               $ 10,000  
Bank of America Syndicate [Member] | Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Maximum Consolidated Total Leverage Ratio Allowed   3.00         2.50    
Line of Credit Facility, Minimum Consolidated Interest Coverage Ratio Required   3.00              
Bank of America Syndicate [Member] | Federal Funds Rate [Member] | Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate   0.50%              
Bank of America Syndicate [Member] | Eurodollar [Member] | Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate   1.00%              
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum   1.50%              
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum   2.00%              
Bank of America Syndicate [Member] | Base Rate [Member] | Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum   0.50%              
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum   1.00%              
Bank of America Syndicate [Member] | Default rate increase [Member] | Credit Agreement [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate   2.00%