Earnings (Loss) Per Share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Feb. 22, 2018	Sep. 30, 2017
Earnings Per Share Disclosure [Line Items]
Anti-dilutive shares		200,000
Percentage of conversion of convertible notes	5.75%
Performance Shares
Earnings Per Share Disclosure [Line Items]
Anti-dilutive shares	300,000	0
Maximum
Earnings Per Share Disclosure [Line Items]
Anti-dilutive shares	100,000
5.75% Senior Subordinated Notes Due August 2023
Earnings Per Share Disclosure [Line Items]
Percentage of conversion of convertible notes	5.75%	5.75%
Convertible Notes
Earnings Per Share Disclosure [Line Items]
Percentage of conversion of convertible notes	1.50%			1.50%
Convertible Notes | 5.75% Senior Subordinated Notes Due August 2023
Earnings Per Share Disclosure [Line Items]
Anti-dilutive shares	33,700,000	8,100,000
Percentage of conversion of convertible notes	5.75%	5.75%	5.75%