Business Segment Information - Reconciliation of Segment Earnings (Loss) to Income Before Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Earnings (Loss):
Segment Earnings (Loss)	$ 17,483	$ 17,791	$ 12,317	$ 12,594	$ 7,684	$ 15,450	$ 12,795	$ 17,443	$ 60,185		$ 53,372		$ 16,396
Stock-based compensation									(2,548)		(1,736)		(1,949)
Legal fees related to debt refinancing									0		0		(115)
Inventory write-off related to closed facilities									0		(954)
Idle facility asset impairment									0		(667)		(1,195)
Non-recurring expenses related to CEO retirement									0		0		(3,385)
Plant startup costs									(1,521)		(401)
Interest (expense) income, net	(9,782)	(9,412)	(8,917)	(8,657)	(8,983)	(9,378)	(13,112)	(9,206)	(36,768)		(40,681)		(37,878)
Depreciation and amortization									(34,292)	[1]	(36,403)	[1]	(40,838)	[1]
Restructuring expenses	(4,200)								(18,142)		(14,844)		(25,708)
(Loss) gain on debt extinguishment	0	0	0	0	0	0	(3,123)	0	0		(3,123)		243
Income (loss) before provision for income taxes	7,799	8,746	3,093	3,060	(1,249)	5,167	(3,390)	7,988	22,698		8,516		(21,597)
Machine Clothing
Segment Earnings (Loss):
Segment Earnings (Loss)									89,305		79,852		66,731
Roll Covers
Segment Earnings (Loss):
Segment Earnings (Loss)									41,172		41,256		34,365
Corporate
Segment Earnings (Loss):
Segment Earnings (Loss)									$ (14,508)		$ (13,783)		$ (11,868)

[1] Excludes amortization of deferred finance costs that are charged to interest expense.