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Income Taxes - Components of Deferred Income Tax Assets and Liabilities (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Deferred Tax Asset on Worker's compensation and other current accruals included in prepaid expenses and other current assets	$ 10,221	$ 8,619

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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