Income Taxes - Loss from Continuing Operations Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Benefit for income taxes at federal statutory rate									$ (17,712)	$ (14,802)	$ (24,868)
State current and deferred income tax benefit									(5,282)	(4,089)	(2,699)
State tax law changes									(4,388)
Tax reform											(22,988)
Other									758	1,915	2,145
Provision (benefit) for income taxes	$ (15,108)	$ (483)	$ (5,733)	$ 400	$ 764	$ (2,426)	$ 4,324	$ (922)	(20,924)	1,740	(40,759)
Federal [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance									2,739	14,604
State [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance									$ 2,961	$ 4,112	$ 7,651