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Stockholders' Equity - Additional Information (Detail) - USD ($)
Jul. 22, 2020
Apr. 22, 2020
Jun. 30, 2020
Dec. 31, 2019
Jul. 24, 2019
Feb. 06, 2019
Jul. 25, 2018
Sep. 06, 2013
Class Of Stock [Line Items]                
Preferred stock, par value     $ 0.01 $ 0.01        
Percentage of beneficial ownership required to exercise the right under Rights agreement, Description   10% (12% for passive investors) or more            
Percentage of discount on purchase of additional share in Right agreement   50.00%            
Percentage of acquisition in merger or other unapproved party description   more than 10% (12% for passive investors)             
Percentage of discount on share acquisition in merger or other unapproved party   50.00%            
Percentage of beneficial ownership not exercisable prior to adoption of Right agreement, Description   10% (12% for passive investors) or more            
Redemption price of rights   $ 0.001            
Expire period of Right agreement   Apr. 22, 2021            
2013 program                
Class Of Stock [Line Items]                
Increase of the authorization under the stock buyback program         $ 250,000,000 $ 250,000,000 $ 250,000,000  
Remaining amount approved for repurchases under stock buyback program     $ 130,000,000          
2013 program | Maximum                
Class Of Stock [Line Items]                
Amount approved for repurchases under stock buyback program               $ 200,000,000
Subsequent Event | Dividend Declared                
Class Of Stock [Line Items]                
Dividend declaration date Jul. 22, 2020              
Dividend per share, declared $ 0.02              
Dividend payment date Sep. 17, 2020              
Dividend record date Sep. 03, 2020              
Series A Junior Participating Preferred Stock                
Class Of Stock [Line Items]                
Preferred stock, par value   $ 0.01            
Preferred stock, exercise price per right   $ 17.00