Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance			$ (217,065)
Ending Balance	$ (205,728)		(205,728)
Cumulative currency translation adjustment [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(120,780)	$ (92,364)	(130,661)	$ (50,371)
Other comprehensive income (loss) before reclassifications	2,681	(27,474)	12,562	(67,858)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	(1,609)
Ending Balance	(118,099)	(119,838)	(118,099)	(119,838)
Benefit plan liabilities [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(84,595)	(82,040)	(84,124)	(86,861)
Other comprehensive income (loss) before reclassifications	(497)	481	(1,638)	4,502
Amounts reclassified from accumulated other comprehensive income (loss)	348	390	1,018	1,190
Ending Balance	(84,744)	(81,169)	(84,744)	(81,169)
Fair value change of derivatives [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(4,766)	(2,942)	(2,280)	(2,011)
Other comprehensive income (loss) before reclassifications	828	(784)	(3,803)	(1,903)
Amounts reclassified from accumulated other comprehensive income (loss)	1,053	413	3,198	601
Ending Balance	(2,885)	(3,313)	(2,885)	(3,313)
Accumulated other comprehensive loss [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(210,141)	(177,346)	(217,065)	(139,243)
Other comprehensive income (loss) before reclassifications	3,012	(27,777)	7,121	(65,259)
Amounts reclassified from accumulated other comprehensive income (loss)	1,401	803	4,216	182
Ending Balance	$ (205,728)	$ (204,320)	$ (205,728)	$ (204,320)