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Long-Term Debt (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Aug. 01, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Debt Instrument [Line Items]            
Loss on early extinguishment of debt   $ 1,676 $ 0 $ 1,676 $ 2,493  
Total debt - principal   2,661,075 2,933,688 2,661,075 2,933,688 $ 2,317,723
Less unamortized debt issuance costs   9,690 14,009 9,690 14,009 13,109
Debt long term and short term less unamortized debt issuance costs combined amount   2,651,385 2,919,679 2,651,385 2,919,679 2,304,614
Less current portion   841,430 733,404 841,430 733,404 170,214
Long-term debt   1,809,955 2,186,275 1,809,955 2,186,275 2,134,400
Bank debt [Member]            
Debt Instrument [Line Items]            
Total debt - principal   1,619,005 1,557,478 1,619,005 1,557,478 951,800
Five and One Half Percent Senior Notes due 2022 [Member]            
Debt Instrument [Line Items]            
Loss on early extinguishment of debt   1,700        
Extinguishment of debt $ 300,000          
Debt Instrument, Redemption Price, Percentage 100.00%          
Total debt - principal   0 $ 300,000 0 $ 300,000 $ 300,000
Senior note interest rate (percent) 5.50%   5.50%   5.50% 5.50%
4 3/4% Senior Notes due 2025 [Member]            
Debt Instrument [Line Items]            
Total debt - principal   $ 300,000 $ 300,000 $ 300,000 $ 300,000 $ 300,000
Senior note interest rate (percent)   4.75% 4.75% 4.75% 4.75% 4.75%
3 1/4% Senior Notes due 2025 [Member]            
Debt Instrument [Line Items]            
Total debt - principal   $ 708,630 $ 754,260 $ 708,630 $ 754,260 $ 744,380
Senior note interest rate (percent)   3.25% 3.25% 3.25% 3.25% 3.25%
Finance leases [Member]            
Debt Instrument [Line Items]            
Total debt - principal   $ 33,440 $ 21,950 $ 33,440 $ 21,950 $ 21,543
Revolving Loan [Member] | Bank debt [Member]            
Debt Instrument [Line Items]            
Total debt - principal   766,000 698,000 766,000 698,000 0
Less current portion   766,000   766,000    
U S Term Loans [Member] | Bank debt [Member]            
Debt Instrument [Line Items]            
Total debt - principal   800,000 800,000 800,000 800,000 800,000
Less current portion   40,000   40,000    
Canadian Term Loans [Member] | Bank debt [Member]            
Debt Instrument [Line Items]            
Total debt - principal   15,943 23,335 15,943 23,335 22,103
Other Foreign Bank Revolving And Term Loans [Member] | Bank debt [Member]            
Debt Instrument [Line Items]            
Total debt - principal   37,062 $ 36,143 37,062 $ 36,143 $ 129,697
Less current portion   33,800   33,800    
Finance leases [Member]            
Debt Instrument [Line Items]            
Less current portion   $ 1,600   $ 1,600