Other Assets - Current (Detail) - USD ($) $ in Thousands		Sep. 30, 2019	Dec. 31, 2018
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
US federal tax receivables		$ 15,855	$ 16,757
Insurance receivable	[1]	15,000
Prepaid advertising		447	1,100
Prepaid expenses		1,484	2,451
Prepaid taxes		8,103	1,755
Prepaid insurance		350	1,446
Due from related parties		3,882	3,903
Other current assets		480	645
Total		$ 45,601	$ 28,057

[1] As of September 30, 2019, the Company recorded an asset of approximately $15.0 million related to insurance claims that the Company believes are probable of recovery from various insurance carriers. These claims pertain to expenses incurred related to certain litigation claims against the Company and related expenses that are discussed throughout Note 11.