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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Jun. 30, 2021
Dec. 31, 2020
Equity, Number of Shares, Par Value and Other Disclosures [Abstract]    
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 50,000,000 50,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 400,000,000 400,000,000
Common stock, shares issued (in shares) 197,666,451 198,331,663
Common stock, shares outstanding (in shares) 187,138,926 187,804,138
Treasury stock, shares (in shares) 10,527,525 10,527,525
Unvested Restricted Stock    
Equity, Number of Shares, Par Value and Other Disclosures [Abstract]    
Common stock, shares outstanding (in shares) 1,907,463 4,349,421