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Provision for Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Deferred Tax Liabilities Recognized [Line items]
Provision for deferred income taxes	$ 1,988	$ 885
Litigation settlement gain		7,468
U.S. federal statutory income tax rate		35.00%
Undistributed Earnings of Foreign Subsidiaries [Member]
Deferred Tax Liabilities Recognized [Line items]
Provision for deferred income taxes		$ 2,100

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The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations.

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The net proceeds or assets obtained in excess of (less than) the net carrying amount of assets recorded, or assets distributed and liabilities assumed less than (in excess of) estimated litigation liability extinguished, in settlement of a litigation matter. Represents (for other than an insurance entity in its normal claims settlement process), the amount of income (expense) recognized in the period to settle pending or threatened litigation and insurance claims.

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