Discontinued Operations and Divestitures - Gains on Disposals of Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Discontinued Operations And Disposal Groups [Abstract]
(Loss) gain on disposal of discontinued operations, before income tax (benefit) expense	$ (874)	$ 36
Income tax (benefit) expense	(400)	13
(Loss) gain on disposal of discontinued operations, net of tax	$ (474)	$ 23

Amount of gain (loss), before tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

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Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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Amount of tax expense or benefit on gain (loss), not previously recognized, resulting from the sale of a business component.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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