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Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
May 06, 2019
Mar. 11, 2019
Feb. 28, 2019
Jul. 23, 2018
May 07, 2018
Apr. 30, 2018
Feb. 22, 2018
Feb. 15, 2018
Feb. 27, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Unrecognized stock based compensation related to all stock-based awards                   $ 16,600    
Weighted average period, expense to recognize                   1 year 8 months 12 days    
Intrinsic value of stock option awards exercised                   $ 354 $ 873 $ 4,500
Options                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Options granted (shares)                   0 0 0
Restricted Stock Units (RSUs)                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Intrinsic value of restricted stock units vested                   $ 10,900 $ 17,800 $ 8,800
Grant date fair value of restricted stock awards granted or assumed                   $ 20,100 $ 17,800 $ 18,400
Restricted stock units, granted (shares)                   1,656,333    
Restricted stock units, vested (shares)                   844,734    
Fair value of awards (in usd per share)                   $ 12.39 $ 11.05  
Restricted Stock Units (RSUs) | Total Shareholder Return                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Vesting percentage (percent)     30.00%                  
Restricted Stock Units (RSUs) | Earnings Per Share                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Vesting percentage (percent)     70.00%                  
Restricted Stock Units (RSUs) | Employees and Officers                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Restricted stock units, granted (shares)   3,025 990,723   4,258   633,107          
Share-based compensation arrangement by share-based payment award, award vesting period             3 years   3 years      
Closing stock price on date of grant (in usd per share)   $ 13.22 $ 12.60   $ 17.61   $ 16.94          
Restricted Stock Units (RSUs) | Chief Executive Officer                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Restricted stock units, granted (shares)     247,619       184,179          
Restricted Stock Units (RSUs) | President                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Restricted stock units, granted (shares)     238,095       177,095          
Restricted Stock Units (RSUs) | Chief Financial Officer                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Restricted stock units, granted (shares)     114,285       85,005          
Restricted Stock Units (RSUs) | Employees, Officers and Directors | Total Shareholder Return                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Fair value of awards (in usd per share)     $ 8.16                  
Restricted Stock Units (RSUs) | Employees, Officers and Directors | Earnings Per Share                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Closing stock price on date of grant (in usd per share)     $ 12.60       $ 16.94          
Fair value of awards (in usd per share)             $ 10.97          
Restricted Stock Units (RSUs) | Board of Directors                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Restricted stock units, granted (shares) 61,488     6,677   40,910            
Closing stock price on date of grant (in usd per share)       $ 16.37   $ 17.11            
Restricted Stock Units (RSUs) | Certain Employees [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Restricted stock units, granted (shares) 1,098                      
Restricted Stock Units (RSUs) | Certain Employees and Directors [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Closing stock price on date of grant (in usd per share) $ 13.66                      
2013 Incentive Plan                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Common stock (shares)                   11,727,833    
Shares available for future grant (shares)                   5,847,900    
2013 Incentive Plan | Restricted Stock Units (RSUs)                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Restricted stock units, granted (shares)               197,898        
Minimum | Restricted Stock Units (RSUs)                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Vesting percentage (percent)     0.00%       0.00%          
Maximum | Restricted Stock Units (RSUs)                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Vesting percentage (percent)     100.00%       100.00%