Annual report pursuant to Section 13 and 15(d)

Income Loss from Discontinued Operations (Detail)

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Income Loss from Discontinued Operations (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Net revenues                 $ 38 $ 1,950 $ 464
Operating expenses                 196 2,793 536
Operating loss                 (158) (843) (72)
Impairment of assets used in discontinued operations                   (382)  
Loss from discontinued operations                 (158) (1,225) (72)
Benefit from income taxes                 (63) (484) (28)
Loss from discontinued operations, net of tax $ 2,010 $ 3,407 $ (1,779) $ 885 $ 1,026 $ 1,689 $ 1,085 $ 2,559 $ (95) $ (741) $ (44)