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Discontinued Operations - Summary of Cash Flow of the Entertainment Segment (Detail)
$ in Thousands
9 Months Ended
Sep. 30, 2017
USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]  
Net cash used in discontinued operating activities $ (6,966)
Net cash used in discontinued investing activities (84)
Net cash used in discontinued financing activities (23,873)
Operating Segments | Entertainment  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]  
Net cash used in discontinued operating activities (6,966)
Net cash used in discontinued investing activities (84)
Net cash used in discontinued financing activities $ (23,873)