Reclassification of Pension and Post-retirement Benefit Plan Out of Accumulated Other Comprehensive Loss (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
Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ (75,662)	$ (129,924)	$ (77,080)	$ (132,031)
Amortization of prior service cost	(63)	(80)	(126)	(160)
Recognized net actuarial losses	4,574	3,465	6,860	6,930
Tax benefit	(1,629)	(1,278)	(2,434)	(2,556)
Total amount reclassified from Accumulated other comprehensive loss, net of tax	2,882	2,107	4,300	4,214
Balance at end of period	(72,780)	(127,817)	(72,780)	(127,817)
Beginning balance	(2,005)	(81)	(1,189)	4,959
Foreign currency translation adjustments, parent	54	(7,265)	(762)	(12,305)
Ending balance	(1,951)	(7,346)	(1,951)	(7,346)
Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(1,744)	(1,017)	(1,602)	(469)
Foreign currency translation adjustments, noncontrolling interest	0	(373)	(142)	(921)
Ending balance	$ (1,744)	$ (1,390)	$ (1,744)	$ (1,390)