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Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax $ 1,817 [1],[2] $ 1,817     $ 3,634 [1],[2]  
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax (18,827) [3] (11,555)     (30,382) [3]  
Foreign currency translation adjustment, gross 43,135   $ (43,474)   85,315 $ (102,804)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total 43,135 42,180 (43,474) $ (59,330)   (102,804)
Other Comprehensive Income (Loss), before Tax 15,048       39,035  
Other Comprehensive Income (Loss), Tax (7,443)   594   (12,264) 3,420
Other comprehensive income (loss), net of tax 22,491   (41,788)   51,299 (93,307)
Other comprehensive income (loss), gross total, before ASU 2017-12     (41,194)     (89,887)
Income tax (benefit) expense related to items of other comprehensive income loss     (594)     (3,420)
Amounts reclassified, net of tax     2,204 [1],[2] 1,303   3,507 [1],[2]
Changes in fair value, net of taxes     3,890 [3] 9,114   13,004 [3]
Other comprehensive income (loss), total, net of tax     (41,788)     (93,307)
Accumulated Other Comprehensive Income (Loss) [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax 1,817 1,817        
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax (18,827) (11,555)        
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total 43,135 $ 42,180 (43,474) (59,330) 85,315  
Amounts reclassified, net of tax     2,204 1,303    
Changes in fair value, net of taxes     3,890 $ 9,114    
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Foreign currency translation adjustment, gross 43,135   (43,474)   85,315 (102,804)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total 43,135   (43,474)   85,315 (102,804)
Interest Rate Swap [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax (2,472)       (4,944)  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (25,615)       (41,336)  
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax [3] (18,827)       (30,382)  
Amounts reclassified, gross     (1,273)     (1,872)
Changes in fair value, gross     3,196     14,965
Amounts reclassified, net of tax           1,376
Changes in fair value, net of taxes [3]     2,349     11,000
Interest Rate Swap [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax (2,472)       (4,944)  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax 655       1,310  
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax (1,817)       (3,634)  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (25,615)       (41,336)  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax 6,788       10,954  
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax (18,827)       (30,382)  
Interest Rate Swap [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Amounts reclassified, gross     (1,273)     (1,872)
Changes in fair value, gross     3,196     14,965
Amounts reclassified, tax effect     337     496
Changes in fair value, tax effect     (847)     (3,965)
Amounts reclassified, net of tax     (936)     (1,376)
Changes in fair value, net of taxes     2,349     11,000
Fuel [Member] | Commodity Contract [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Amounts reclassified, gross     (1,688)     (2,837)
Changes in fair value, gross     2,045     2,661
Amounts reclassified, net of tax           2,131
Changes in fair value, net of taxes [3]     1,541     2,004
Fuel [Member] | Commodity Contract [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Amounts reclassified, gross     (1,688)     (2,837)
Changes in fair value, gross     2,045     2,661
Amounts reclassified, tax effect     420     706
Changes in fair value, tax effect     (504)     (657)
Amounts reclassified, net of tax     (1,268)     (2,131)
Changes in fair value, net of taxes     1,541     2,004
Interest Expense [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax [1],[2] $ 1,817       $ 3,634  
Amounts reclassified, net of tax [1],[2]     936     1,376
Cost of Operations [Member]            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Amounts reclassified, net of tax [1],[2]     $ 1,268     $ 2,131
[1] Amounts reclassified from AOCIL into earnings related to realized gains and losses on interest rate swaps are recognized when interest payments or receipts occur related to the swap contracts, which correspond to when interest payments are made on the Company’s hedged debt.
[2] Amounts reclassified from AOCIL into earnings related to realized gains and losses on the fuel hedges are recognized when settlement payments or receipts occur related to the hedge contracts, which correspond to when the underlying fuel is consumed.
[3] In accordance with the derivatives and hedging guidance, the changes in fair values of interest rate swaps and fuel hedges have been recorded in equity as a component of AOCIL. As the critical terms of the interest rate swaps match the underlying debt being hedged, all unrealized changes in fair value are recorded in AOCIL. Because changes in the actual price of diesel fuel and changes in the DOE index price did not offset exactly each reporting period, the Company assessed whether the fuel hedges were highly effective using the cumulative dollar offset approach.