Discontinued Operations - Summary of Activity for Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Revenue from discontinued operations		$ 1
Operating loss before income taxes		(86)
Income tax benefit from discontinued operations		34
Loss on disposal, before income taxes	0	0
Income tax benefit on disposal	0	0
Loss from discontinued operations		$ (52)

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

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Pretax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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Income tax expense or benefit attributable to Income or Loss from discontinued operations during the phase-out period.

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

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Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount 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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