Summary of Revised Consolidated Statement of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2020	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Selling, general and administrative expenses	$ 14,762		$ 31,912	$ 41,827	$ 59,398	$ 84,748
Operating Income (loss)	3,765		(1,087)	65,263	67,601	(31,532)
Interest expense		$ 17,056	34,103	52,592	67,694	56,921
Loss before income taxes					(5,181)	(94,242)
Provision for income taxes					(2,205)	5,683
Net Income (loss)	$ (15,464)	$ (21,001)	$ (36,466)	$ 10,236	$ (2,976)	$ (99,925)
Net loss per share - basic and diluted	$ (1.44)	$ (1.89)	$ (3.33)			$ (10.37)
Earnings (loss) per share - basic				$ 0.54	$ (0.60)	(10.37)
Earnings (loss) per share - diluted				$ 0.37	$ (0.60)	$ (10.37)
As Reported
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Selling, general and administrative expenses	$ 14,978		$ 32,128	$ 42,043		$ 83,996
Operating Income (loss)	3,549		(1,303)	65,047		(30,780)
Interest expense		$ 16,713	33,760	52,249		57,264
Loss before income taxes						(93,833)
Provision for income taxes						8,083
Net Income (loss)	$ (15,680)	$ (20,658)	$ (36,339)	$ 10,363		$ (101,916)
Net loss per share - basic and diluted	$ (1.46)	$ (1.86)	$ (3.32)			$ (10.56)
Earnings (loss) per share - basic				$ 0.55
Earnings (loss) per share - diluted				$ 0.37
Adjustments
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Selling, general and administrative expenses	$ (216)		$ (216)	$ (216)		$ 752
Operating Income (loss)	216		216	216		(752)
Interest expense		$ 343	343	343		(343)
Loss before income taxes						(409)
Provision for income taxes						(2,400)
Net Income (loss)	$ 216	$ (343)	$ (127)	$ (127)		$ 1,991
Net loss per share - basic and diluted	$ 0.02	$ (0.03)	$ (0.01)			$ 0.19
Earnings (loss) per share - basic				$ (0.01)