SCHEDULE II - FINANCIAL INFORMATION OF REGISTRANT- PARENT COMPANY ONLY - Balance Sheets Additional Information - Parent Company Only (Details) - $ / shares
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Condensed Balance Sheet Statements, Captions [Line Items]      
Common stock, par value (in dollars per share) $ 0.01 $ 0.01 $ 0.01
Common stock, issued (in shares) 68,358,074 66,318,849  
Common stock, outstanding (in shares) 68,358,074 66,318,849  
Common stock, authorized (in shares) 250,000,000 250,000,000  
Parent      
Condensed Balance Sheet Statements, Captions [Line Items]      
Common stock, par value (in dollars per share) $ 0.01 $ 0.01  
Common stock, issued (in shares) 68,358,074 68,358,074  
Common stock, outstanding (in shares) 66,318,849 66,318,849  
Common stock, authorized (in shares) 250,000,000 250,000,000