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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares
Sep. 30, 2021
Dec. 31, 2020
Statement Of Financial Position [Abstract]    
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, authorized 10,000,000 10,000,000
Preferred stock, issued 0 0
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 180,000,000 180,000,000
Common stock, shares issued 89,006,713 88,024,395
Common stock, shares outstanding 89,006,713 88,024,395