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Share-Based Compensation and Other Benefit Plans - Activity of Awarded Restricted Stock Units (Detail) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Restricted Stock Units (RSUs)      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 3.6 $ 2.8 $ 3.0
Number of shares      
Balance at beginning of year (in shares) 319,280    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 120,262    
Vested (in shares) (174,972)    
Forfeited (in shares) (34,053)    
Balance at end of year (in shares) 230,517 319,280  
Weighted-Average Grant Date Fair Value      
Balance at beginning of year (in dollars per share) $ 13.56    
Average grant-date fair value (in dollars per share) 14.12    
Vested (in dollars per share) 20.81    
Forfeited (in dollars per share) 10.65    
Balance at end of year (in dollars per share) $ 9.20 $ 13.56  
Performance Restricted Stock Units      
Number of shares      
Balance at beginning of year (in shares) 173,532    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 225,206    
Vested (in shares) (9,816)    
Forfeited (in shares) (43,853)    
Balance at end of year (in shares) 345,069 173,532  
Weighted-Average Grant Date Fair Value      
Balance at beginning of year (in dollars per share) $ 13.68    
Average grant-date fair value (in dollars per share) 22.44    
Vested (in dollars per share) 26.60    
Forfeited (in dollars per share) 14.90    
Balance at end of year (in dollars per share) $ 16.20 $ 13.68  
Dividend yield 0.00% 0.00% 0.00%
Risk-free interest rate, max 0.29% 0.51%  
Risk-free interest rate, min 0.22% 0.18%  
Expected volatility, min 131.74% 101.32%  
Expected volatility, max 134.74% 117.71%  
Performance Shares | Share-based Payment Arrangement, Tranche One      
Weighted-Average Grant Date Fair Value      
Average grant-date fair value (in dollars per share)     $ 34.02
Minimum | Performance Shares      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Shares, Expected to Vest, Percentage 0.00% 0.00% 0.00%
Minimum | Performance Shares | Share-based Payment Arrangement, Tranche One      
Weighted-Average Grant Date Fair Value      
Average grant-date fair value (in dollars per share) $ 17.74 $ 2.40  
Maximum | Performance Shares      
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Shares, Expected to Vest, Percentage 200.00% 200.00% 200.00%
Maximum | Performance Shares | Share-based Payment Arrangement, Tranche One      
Weighted-Average Grant Date Fair Value      
Average grant-date fair value (in dollars per share) $ 33.31 $ 16.02