Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation and Other Benefit Plans - Fair Value of Each Award Estimated on Date of Grant Using Black-Scholes-Merton Option-Pricing Formula (Detail)

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Share-Based Compensation and Other Benefit Plans - Fair Value of Each Award Estimated on Date of Grant Using Black-Scholes-Merton Option-Pricing Formula (Detail) - Performance Restricted Stock Units [Domain]
12 Months Ended
Dec. 31, 2019
Dec. 31, 2017
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]    
Expected volatility, min   59.63%
Expected volatility, max 49.90% 62.18%
Dividend yield 0.00% 0.00%
Risk-free interest rate, min   1.44%
Risk-free interest rate, max 1.66% 1.51%