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Net Deferred Tax Asset Balance Sheet Classification (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Balance Sheet Classification of Deferred Income Tax Assets and Liabilities [Line Items]
Deferred tax asset, current	$ 7,694	$ 7,121
Deferred tax asset, non-current	18,004	15,661
Net deferred tax assets	$ 25,698	$ 22,782

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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- Definition

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

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