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Income Taxes - Additional Information (Detail) (USD $)
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3 Months Ended | 9 Months Ended | 3 Months Ended | 1 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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Dec. 31, 2012
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Sep. 30, 2013
U.S. Entities
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Dec. 31, 2012
U.S. Entities
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Sep. 30, 2013
Non-U.S. Entities
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Dec. 31, 2012
Non-U.S. Entities
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Jun. 30, 2013
GERMANY
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Apr. 30, 2013
GERMANY
Minimum
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Apr. 30, 2013
GERMANY
Maximum
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| Income Taxes | ||||||||||||
| Tax examination year | 2005 | 2008 | ||||||||||
| Reduction in unrecognized tax benefits due to settlement with taxing authorities | $ 1,400,000 | |||||||||||
| Reductions in unrecognized tax benefits due to the expiration of the statute of limitations | 12,700,000 | |||||||||||
| Unrecognized tax benefits | 2,900,000 | 2,900,000 | ||||||||||
| Unrecognized tax benefits would impact the effective tax rate | 2,400,000 | 2,400,000 | ||||||||||
| Decrease in unrecognized tax benefits | 800,000 | |||||||||||
| Interest accrued | 300,000 | 300,000 | ||||||||||
| Effective tax rate from operations | 2012.10% | 30.30% | ||||||||||
| Provision for income taxes | (8,653,000) | 2,097,000 | (10,946,000) | 6,147,000 | ||||||||
| Cash and cash equivalents and short-term investments | 127,700,000 | 39,200,000 | 216,300,000 | 183,800,000 | ||||||||
| Undistributed foreign earnings | $ 184,000,000 | |||||||||||
| U.S. statutory rate | 35.00% | |||||||||||