Discontinued Operations and Divestitures - Loss from Discontinued Operations, Net of Tax (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Discontinued Operations And Disposal Groups [Abstract]
Revenue	$ 92,007	$ 139,574	$ 143,478
Income from operations of discontinued operations before income tax expense	5,131	13,548	14,727
Income tax expense	2,593	5,244	5,873
Income from operations of discontinued operations operations, net of tax	$ 2,538	$ 8,304	$ 8,854

Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): 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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Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, 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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