Accumulated Comprehensive Income (Loss) - Accumulated Comprehensive Income (Activity) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (37,288)	$ (26,308)
Net current period change	(2,852)	(11,233)
Reclassification adjustments for losses reclassified into income	486	253
Ending balance	(39,654)	(37,288)
Foreign currency items
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(16,507)	(11,907)
Net current period change	(4,572)	(4,600)
Reclassification adjustments for losses reclassified into income	0	0
Ending balance	(21,079)	(16,507)
Pension and postretirement benefits plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(20,781)	(14,401)
Net current period change	1,720	(6,633)
Reclassification adjustments for losses reclassified into income	486	253
Ending balance	$ (18,575)	$ (20,781)