Comprehensive (Loss) Income and Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax Benefits	$ 8,154
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(30,052)
Other comprehensive loss before reclassifications	(38,878)
Amounts reclassified from other comprehensive (loss) income
Amortization of actuarial losses	(17,135)
Amortization of interest expense	127
Net current period other comprehensive (loss) income	(55,886)
Ending Balance	(85,938)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(136)
Other comprehensive loss before reclassifications	(38,878)
Amounts reclassified from other comprehensive (loss) income
Amortization of actuarial losses	0
Amortization of interest expense	0
Net current period other comprehensive (loss) income	(38,878)
Ending Balance	(39,014)
Pension Liability Changes Under Topic 715
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(29,681)
Other comprehensive loss before reclassifications	0
Amounts reclassified from other comprehensive (loss) income
Amortization of actuarial losses	(17,135)
Amortization of interest expense	0
Net current period other comprehensive (loss) income	(17,135)
Ending Balance	(46,816)
Change in Value of Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(235)
Other comprehensive loss before reclassifications	0
Amounts reclassified from other comprehensive (loss) income
Amortization of actuarial losses	0
Amortization of interest expense	127
Net current period other comprehensive (loss) income	127
Ending Balance	$ (108)