Annual report pursuant to Section 13 and 15(d)

Equity Compensation - Summary of Weighted Average Fair Value of Options Granted (Details)

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Equity Compensation - Summary of Weighted Average Fair Value of Options Granted (Details) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award      
Weighted Average Fair Value of the Options Granted (in usd per share) $ 11.93 $ 14.64 $ 15.30