Components of Income from Discontinued Operations (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2014 USD ($)
Discontinued Operations And Disposal Groups [Abstract]
Net revenue	$ 835
Discontinued operations:
Income from discontinued operations, net of income taxes of nil	35
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 from discontinued operations, net of income taxes	$ 487