Components of Change in Other Assets and Liabilities Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Schedule of Cash Flow, Supplemental
Other current and noncurrent assets	$ (783)	$ 549
Accrued salaries, benefits and payroll taxes	(3,984)	(6,075)
Accrued insurance and other taxes	(1,838)	(1,213)
Accrued income taxes	(4,595)	(8,261)
Accrued pension, postretirement and post employment benefits	2,763	1,538
Other current and noncurrent liabilities	9,311	15,047
Change in other assets and liabilities	$ 874	$ 1,585