Major Components of Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accrued Liabilities [Line Items]
Employees related accruals-current	$ 14,214	$ 6,088
Other operating accruals	64,570	32,409
Accrued interest	9,789	9,711
Retirement benefits and other accruals	700	2,000
Total accrued liabilities	89,273	50,208
Total short-term accrued liabilities	88,573	48,208
Total long-term accrued liabilities	$ 700	$ 2,000