Components of Income (Loss) from Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net revenues	$ 529	$ 5,109
Discontinued operations:
Income (loss) from discontinued operations, net of income taxes of nil	22	(776)
Adjustments to amounts reported previously for gain on sale of discontinued operations, net of income taxes of nil	(51)
Gain on sale of discontinued operations, net of income taxes of nil	503
Income (loss) from discontinued operations, net of income taxes	$ 474	$ (776)

Adjustment, net of tax, to an amount previously reported in discontinued operations that is directly related to the disposal of the component in a prior period. Examples of circumstances leading to such adjustments include the resolution of contingencies relating to the terms of the disposal transaction or relating to the operations of the component prior to its disposal, and the settlement of certain employee benefit plan obligations.

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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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