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Amounts Included in Accumulated Other Comprehensive Loss, Net of Tax (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Other Comprehensive Income (Loss) [Roll Forward]    
Balance at December 31, 2018 $ (268,808)  
Other comprehensive loss before reclassifications (6,129)  
Amounts reclassified from accumulated other comprehensive loss 2,506  
Other comprehensive loss (3,623) $ 14,266
Balance at March 31, 2019 (272,431) $ (174,707)
Unrecognized Net Defined Benefit Plan Costs [Member]    
Other Comprehensive Income (Loss) [Roll Forward]    
Balance at December 31, 2018 (154,466)  
Other comprehensive loss before reclassifications 0  
Amounts reclassified from accumulated other comprehensive loss 2,506  
Other comprehensive loss 2,506  
Balance at March 31, 2019 (151,960)  
Change in Fair Value of Derivatives [Member]    
Other Comprehensive Income (Loss) [Roll Forward]    
Balance at December 31, 2018 (1,008)  
Other comprehensive loss before reclassifications (887)  
Amounts reclassified from accumulated other comprehensive loss 0  
Other comprehensive loss (887)  
Balance at March 31, 2019 (1,895)  
Foreign Currency Translation [Member]    
Other Comprehensive Income (Loss) [Roll Forward]    
Balance at December 31, 2018 (113,334)  
Other comprehensive loss before reclassifications (5,242)  
Amounts reclassified from accumulated other comprehensive loss 0  
Other comprehensive loss (5,242)  
Balance at March 31, 2019 $ (118,576)