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Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Sep. 30, 2019
Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax $ 1,451 [1],[2] $ 1,817 $ 1,817       $ 5,085 [1],[2]  
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax (11,379) [3] (18,827) (11,555)       (41,761) [3]  
Foreign currency translation adjustment, gross (24,911)     $ 35,455     60,404 $ (67,349)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total (24,911) 43,135 42,180 35,455 $ (43,474) $ (59,330)   (67,349)
Other Comprehensive Income (Loss), before Tax (42,367)           (3,332)  
Other Comprehensive Income (Loss), Tax (4,626)     985     (16,890) 4,405
Other comprehensive income (loss), net of tax (37,741)     38,097     13,558 (55,210)
Other comprehensive income (loss), gross total, before ASU 2017-12       39,082       (50,805)
Income tax (benefit) expense related to items of other comprehensive income loss       (985)       (4,405)
Amounts reclassified, net of tax       (1,786) [1],[2] 2,204 1,303   1,721 [1],[2]
Changes in fair value, net of taxes       856 [3] 3,890 9,114   13,860 [3]
Other comprehensive income (loss), total, net of tax       38,097       (55,210)
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 1,451 1,817 1,817          
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax (11,379) (18,827) (11,555)          
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total (24,911) $ 43,135 $ 42,180 35,455 (43,474) (59,330) 60,404  
Amounts reclassified, net of tax       (1,786) 2,204 1,303    
Changes in fair value, net of taxes       856 $ 3,890 $ 9,114    
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Foreign currency translation adjustment, gross (24,911)     35,455     60,404 (67,349)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total (24,911)     35,455     60,404 (67,349)
Interest Rate Swap [Member]                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax (1,974)           (6,918)  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (15,482)           (56,818)  
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax [3] (11,379)           (41,761)  
Amounts reclassified, gross       4,279       2,407
Changes in fair value, gross       863       15,828
Amounts reclassified, net of tax               (1,769)
Changes in fair value, net of taxes [3]       634       11,634
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 (1,974)           (6,918)  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax 523           1,833  
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax (1,451)           (5,085)  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (15,482)           (56,818)  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax 4,103           15,057  
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax (11,379)           (41,761)  
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       4,279       2,407
Changes in fair value, gross       863       15,828
Amounts reclassified, tax effect       (1,134)       (638)
Changes in fair value, tax effect       (229)       (4,194)
Amounts reclassified, net of tax       3,145       1,769
Changes in fair value, net of taxes       634       11,634
Fuel [Member] | Commodity Contract [Member]                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Amount of Gain or (Loss) Recognized as AOCIL on Derivatives, Net of Tax 0           0  
Amounts reclassified, gross       (1,810)       (4,647)
Changes in fair value, gross       295       2,956
Amounts reclassified, net of tax               3,490
Changes in fair value, net of taxes [3]       222       2,226
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       (1,810)       (4,647)
Changes in fair value, gross       295       2,956
Amounts reclassified, tax effect       451       1,157
Changes in fair value, tax effect       (73)       (730)
Amounts reclassified, net of tax       (1,359)       (3,490)
Changes in fair value, net of taxes       222       2,226
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] 1,451           5,085  
Amounts reclassified, net of tax [1],[2]       (3,145)       (1,769)
Cost of Operations [Member]                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Amount of Gain or (Loss) Recognized from AOCIL into Earnings, Net of Tax $ 0           $ 0  
Amounts reclassified, net of tax [1],[2]       $ 1,359       $ 3,490
[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.