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Summary of Company's Operating Results for Discontinued Operations (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Revenue $ 0 $ 4,975,000 $ 0 $ 18,422,000
Income/(loss) before income taxes from discontinued operations 140,000 (663,000) 834,000 (2,996,000)
Income tax/(benefit) provision 36,000 (237,000) 301,000 (1,093,000)
Income/(loss) from discontinued operations, net of tax $ 104,000 $ (426,000) $ 533,000 $ (1,903,000)