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Note 12 - Financial Instruments - Swaps Outstanding (Details) - USD ($)
$ in Thousands
9 Months Ended
Aug. 31, 2019
Dec. 01, 2018
Oct. 20, 2017
Feb. 24, 2017
Oct. 07, 2015
Foreign Currency Cash Flow Hedge Asset at Fair Value $ 28,024 $ 739      
Cross Currency Interest Rate Contract [Member]          
Derivative, Notional Amount 488,712   $ 401,200 $ 42,600 $ 44,912
Foreign Currency Cash Flow Hedge Asset at Fair Value $ 28,024        
Cross Currency Interest Rate Contract [Member] | Currency Swap 1 [Member]          
Fiscal Year of Expiration 2019        
Interest rate minimum 3.80%        
Derivative, Notional Amount $ 44,912        
Foreign Currency Cash Flow Hedge Asset at Fair Value $ 905        
Interest rate maximum 5.053%        
Cross Currency Interest Rate Contract [Member] | Currency Swap 2 [Member]          
Fiscal Year of Expiration 2020        
Interest rate minimum 1.95%        
Derivative, Notional Amount $ 42,600        
Interest rate maximum 4.3038%        
Fair Value $ (1,466)        
Cross Currency Interest Rate Contract [Member] | Currency Swap 3 [Member]          
Fiscal Year of Expiration 2021        
Interest rate minimum 2.75%        
Derivative, Notional Amount $ 133,340        
Foreign Currency Cash Flow Hedge Asset at Fair Value $ 9,234        
Interest rate maximum 4.933%        
Cross Currency Interest Rate Contract [Member] | Currency Swap 4 [Member]          
Fiscal Year of Expiration 2022        
Interest rate minimum 3.00%        
Derivative, Notional Amount $ 267,860        
Foreign Currency Cash Flow Hedge Asset at Fair Value $ 19,351        
Interest rate maximum 5.1803%