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Share-Based Compensation - Summary of Market Stock Units (Details) - Market Stock Units - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Shares [Roll Forward]      
Granted (in shares) 150,000 0 0
Nonvested, end of period (in shares) 150,000    
Weighted-Average Grant Date Fair Value [Roll Forward]      
Granted (in dollars per share) $ 18.84    
Nonvested, end of period (in dollars per share) $ 18.84