Discontinued Operations - Additional Information (Detail) - USD ($)		3 Months Ended		6 Months Ended		12 Months Ended
	Oct. 27, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	May 09, 2017
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Amortization of convertible note discount				$ 5,411,000	$ 8,928,000
Write-off of deferred financing costs	$ 9,300,000
Senior Secured Term Loan
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Amortization of convertible note discount		$ 1,200,000	$ 0	1,800,000	0
Write-off of deferred financing costs				$ 20,700,000		$ 8,000,000
Operating Segments | Entertainment
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sell price of business							$ 349,100,000
Interest expense			6,500,000		12,900,000
Prepayment premium			13,509,000		29,246,000
Operating Segments | Entertainment | Senior Secured Term Loan
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Amortization of convertible note discount			$ 900,000		1,700,000
Prepayment premium					15,200,000
Write-off of deferred financing costs					9,400,000
Write-off of original issue discount					$ 4,700,000