Summary of Company's Operating Results for Discontinued Operations (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$ 0	$ 6,151,000	$ 0	$ 13,447,000
Income/(loss) before income taxes from discontinued operations	649,000	(1,409,000)	694,000	(2,333,000)
Income tax/(benefit) provision	248,000	(510,000)	265,000	(856,000)
Income/(loss) from discontinued operations, net of tax	$ 401,000	$ (899,000)	$ 429,000	$ (1,477,000)