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Basis of Presentation - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income tax benefit associated with loss from discontinued operations	$ 5	$ (3,852)	$ 8	$ (3,847)	$ (683)
Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income tax benefit associated with loss from discontinued operations		$ 2,214

Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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