Discontinued Operations - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	May 09, 2017	Jan. 31, 2017
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Amortization of convertible note discount			$ 8,928	$ 15,498
Senior Secured Term Loan
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Debt issue discount costs			1,700		$ 2,100
Deferred financing costs	$ 800		800		$ 1,000		$ 1,000
Operating Segments | Entertainment
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sell price of business						$ 345,000
Pre-tax gain on sale of Entertainment segment	104,300
Estimated transaction costs	7,600
Interest expense	6,500	$ 6,100	12,900	8,100
Prepayment premium	13,509		29,246
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	$ 600	1,700	$ 900
Prepayment premium			15,200
Debt issue discount costs			9,400
Deferred financing costs	$ 4,700		$ 4,700