Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	$ (241,896)
Ending Balance	(246,048)
Cumulative currency translation adjustment [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(136,579)	$ (153,933)
Other comprehensive income (loss) before reclassifications	(6,320)	(28,382)
Ending Balance	(142,899)	(182,315)
Benefit plan liabilities [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(106,079)	(100,160)
Other comprehensive income (loss) before reclassifications	1,643	2,024
Amounts reclassified from accumulated other comprehensive income (loss)	1,096	658
Ending Balance	(103,340)	(97,478)
Fair value change of derivatives [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	762	352
Other comprehensive income (loss) before reclassifications	(432)	(9,984)
Amounts reclassified from accumulated other comprehensive income (loss)	(139)	(92)
Ending Balance	191	(9,724)
Accumulated other comprehensive loss [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Ending Balance	$ (246,048)	$ (289,517)