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Deferred Income Tax Amounts Included on Consolidated Statements of Financial Position (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Deferred Income Tax Assets and Liabilities [Line Items]
Current deferred income tax assets, net	$ 102,993	$ 88,578
Long-term deferred income tax liabilities, net	(14,244)	(14,377)
Total deferred income tax assets, net	$ 88,749	$ 74,201

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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- Definition

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

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