Business Restructuring - Reconciliation of Restructuring Liabilities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restructuring Cost And Reserve [Line Items]
Expense recognized	$ 733	$ 358
Longford Mills [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring liability	343
Expense recognized	322
Amounts paid	(401)
Foreign currency translation	8
Restructuring liability	272
Longford Mills [Member] | Termination Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring liability	260
Amounts paid	(79)
Foreign currency translation	6
Restructuring liability	187
Longford Mills [Member] | Other Expense [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring liability	83
Expense recognized	322
Amounts paid	(322)
Foreign currency translation	2
Restructuring liability	$ 85