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Note 7 - Notes Payable, Long-Term Debt and Lines of Credit (Details Textual) - USD ($)
Oct. 31, 2014
Nov. 28, 2015
Nov. 29, 2014
Nov. 30, 2013
Mar. 05, 2012
Dec. 16, 2009
Senior Notes Series A [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Derivative, Basis Spread on Variable Rate           1.59%
Senior Notes Series A [Member]            
Debt Instrument, Face Amount           $ 17,000,000
Debt Instrument, Interest Rate, Stated Percentage           5.13%
Senior Notes Series B [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Derivative, Basis Spread on Variable Rate           1.47%
Senior Notes Series B [Member]            
Debt Instrument, Face Amount           $ 33,000,000
Debt Instrument, Interest Rate, Stated Percentage           5.13%
Senior Notes Series C [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Derivative, Basis Spread on Variable Rate           1.78%
Senior Notes Series C [Member]            
Debt Instrument, Face Amount           $ 35,000,000
Debt Instrument, Interest Rate, Stated Percentage           5.61%
Senior Notes Series C, Swapped Portion [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Face Amount           $ 25,000,000
Senior Notes Series D [Member]            
Debt Instrument, Face Amount           $ 65,000,000
Debt Instrument, Interest Rate, Stated Percentage           5.61%
Senior Notes Series E [Member]            
Debt Instrument, Face Amount         $ 250,000,000  
Debt Instrument, Interest Rate, Stated Percentage         4.12%  
Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Basis Spread on Variable Rate 1.25%          
Term Loan [Member]            
Debt Instrument, Face Amount $ 300,000,000          
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]            
Debt Instrument, Basis Spread on Variable Rate 1.075%          
Revolving Credit Facility [Member]            
Line of Credit Facility, Maximum Borrowing Capacity $ 300,000,000          
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.175%          
Line of Credit, Current   $ 0        
Notes Payable, Current   $ 30,757,000 $ 27,149,000      
Short-term Debt, Weighted Average Interest Rate   8.10% 11.30% 8.90%    
Debt Instrument, Face Amount         $ 250,000,000 $ 150,000,000
Line of Credit Facility, Maximum Borrowing Capacity   $ 300,000,000        
Long-term Debt, Fair Value   $ 716,213,000 $ 606,194,000