5. Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	$ 4.4	$ 2.6
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	11.1	36.8
Deferred Tax Assets, Valuation Allowance	4.3	5.0
Other Information Pertaining to Income Taxes	On March 16, 2007, the PRC National People's Congress passed the PRC Enterprise Income Tax Law ("EIT Law") which became effective on January 1, 2008. The EIT Law applies a uniform 25% enterprise income tax rate to both foreign invested enterprises and domestic enterprises. The EIT Law provides a five-year transition period from its effective date for those enterprises which were established before the promulgation date of the EIT Law and which were entitled to a preferential tax treatment such as a reduced tax rate or a tax holiday. On December 26, 2007, the PRC State Council issued the Notice of the State Council Concerning Implementation of Transitional Rules for Enterprise Income Tax Incentives ("Circular 39"). Based on Circular 39, certain specifically listed categories of enterprises which enjoyed a preferential tax rate are eligible for a graduated rate increase to 25% over the 5-year period beginning from January 1, 2008.
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	34.00%	34.00%	34.00%
Income Tax Examination, Penalties and Interest Accrued	1.9	1.9	1.6
Income Tax Examination, Penalties and Interest Expense	0.04	0.20	0.60
People's Republic of China (PRC) [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	25.00%	25.00%	25.00%
Undistributed Earnings of Foreign Subsidiaries	$ 164