Business Restructuring and Asset Impairments - Reconciliation of Restructuring Liability (Detail) - 2016 Restructuring [Member] - Longford Mills [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost And Reserve [Line Items]
Restructuring liability	$ 691	$ 1,985
Expense recognized	1,185	2,022
Amounts paid	(1,506)	(3,389)
Foreign currency translation	(27)	73
Restructuring liability	343	691
Termination Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring liability	592	1,548
Amounts paid	(312)	(1,012)
Foreign currency translation	(20)	56
Restructuring liability	260	592
Other Expense [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring liability	99	437
Expense recognized	1,185	2,022
Amounts paid	(1,194)	(2,377)
Foreign currency translation	(7)	17
Restructuring liability	$ 83	$ 99