Common Shares and Share-based Compensation - Stock Options Outstanding, Exercisable and Expected to Vest (Details) (Parenthetical) (Details)	Dec. 31, 2019 $ / shares
Amended and Restated 2010 Incentive Plan \| Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock fair value per share	$ 88.44

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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