- Components of Comprehensive (Loss) Income (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
Comprehensive Income (Loss) And Accumulated Other Comprehensive Income (Loss) [Abstract]
Net (loss) income	$ 11,159	$ (20,472)	$ 764	$ 1,167	$ 3,443	$ 2,104	$ (6,879)	$ 5,485	$ (7,382)	$ 4,153	$ (18,035)
Foreign currency translation adjustments									(38,878)	(3,389)
Pension liability changes under Topic 715									(17,135)	14,821
Change in value of derivative instruments									127	409
Comprehensive (loss) income, net of tax	$ (23,785)	$ (41,003)	$ 2,278	$ (758)	$ 13,330	$ 9,182	$ (9,245)	$ 2,727	$ (63,268)	$ 15,994	$ (28,382)