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Discontinued Operations - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]        
Income (loss) from discontinued operations $ 1 $ 14 $ 1 $ 37