Income Tax Effects Allocated to and Cumulative Balance of Accumulated Other Comprehensive Income (loss) (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 1,408
Pretax Amount	(12,499)
Tax Effect	(1,141)
Net-of-Tax Amount	(11,358)
Ending Balance	(9,950)
Foreign currency translation adjustments and Transfers from NCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	3,360
Pretax Amount	(12,983)
Tax Effect	(1,315)
Net-of-Tax Amount	(11,668)
Ending Balance	(8,308)
Change in Accumulated OCI Related to Postretirement Healthcare Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,952)
Pretax Amount	484
Tax Effect	174
Net-of-Tax Amount	310
Ending Balance	$ (1,642)