Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax asset:
Carrying values of ownership interests and other holdings	$ 32,760	$ 60,951
Tax loss and credit carryforwards	70,914	62,901
Disallowed interest carryforwards	7,292	3,831
Credit facility repayment feature	0	1,312
Accrued expenses	213	675
Stock-based compensation	432	550
Other	604	1,034
Deferred tax assets, gross	112,215	131,254
Valuation allowance	(112,215)	(131,254)
Net deferred tax asset	$ 0	$ 0