Schedule of Net Revenues and Operating Results (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Discontinued Operation, Additional Disclosures [Abstract]
Net revenues	$ 11,700,000	$ 15,300,000	$ 24,800,000	$ 30,400,000
(Loss) before income taxes	(800,000)	0	(1,600,000)	(2,400,000)
Income tax benefit	300,000	0	600,000	1,000,000
Discontinued operations, net of tax	$ (490,000)	$ (21,000)	$ (982,000)	$ (1,414,000)