Income Taxes - Changes in Valuation Allowance for Deferred Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Beginning balance	$ 178,729	$ 162,968	$ 200,056
Charged to expense (income)	29,484	24,062	(21,184)
NOL and tax credit expiration	(7,605)	(10,150)	(25,305)
Translation adjustment	(5,869)	1,849	9,401
Ending balance	$ 194,739	$ 178,729	$ 162,968

Deferred tax assets valuation allowance charged to expense income.

No definition available.

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- Definition

Deferred tax assets valuation allowance foreign currency translation adjustment.

+ References

No definition available.

+ Details

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- Definition

Deferred Tax Assets Valuation Allowances On Net Operating Loss and Tax Credit Expiration

+ References

No definition available.

+ Details

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

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- Details

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