Accumulated Other Comprehensive Income - Schedule of Changes in Accumulated Other Comprehensive Income (Losses) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (72,392)	$ (171,655)	$ (75,357)	$ (163,966)
Other comprehensive income before reclassifications (net of tax)	85	3,196	410	(8,371)
Amounts reclassified from accumulated other comprehensive income (net of tax)	2,941	3,909	5,581	7,787
Other comprehensive income (loss)	3,026	7,105	5,991	(584)
Ending Balance	(69,366)	(164,550)	(69,366)	(164,550)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	15,869	(11,642)	15,141	315
Other comprehensive income before reclassifications (net of tax)	(533)	3,727	195	(8,230)
Other comprehensive income (loss)	(533)	3,727	195	(8,230)
Ending Balance	15,336	(7,915)	15,336	(7,915)
Unrealized Gain (Loss) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,020)	17	(941)	(424)
Other comprehensive income before reclassifications (net of tax)	618	(531)	215	(141)
Amounts reclassified from accumulated other comprehensive income (net of tax)	462	136	786	187
Other comprehensive income (loss)	1,080	(395)	1,001	46
Ending Balance	60	(378)	60	(378)
Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(87,266)	(155,781)	(89,547)	(159,560)
Other comprehensive income before reclassifications (net of tax)	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (net of tax)	2,444	3,725	4,725	7,504
Other comprehensive income (loss)	2,444	3,725	4,725	7,504
Ending Balance	(84,822)	(152,056)	(84,822)	(152,056)
Other Postretirement Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	25	(4,249)	(10)	(4,297)
Other comprehensive income before reclassifications (net of tax)	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (net of tax)	35	48	70	96
Other comprehensive income (loss)	35	48	70	96
Ending Balance	$ 60	$ (4,201)	$ 60	$ (4,201)