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Stock Based Awards and Other Equity Instruments - Summary of Stock Option Activity (Parenthetical) (Details) - $ / shares | 1 Months Ended | 12 Months Ended
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Nov. 30, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Estimated grant-date fair value per option pricing model |  | $ 21.25 | $ 18.11 | $ 16.50 |
Stock Options |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Number of stock options issued |  | 752,000 | 762,000 | 2,333,000 | [1]
Options non converted into shares due to net share settlement |  | 120,112 | 814,635 | 294,410 |
Stock Options | CEO |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Number of stock options issued | 780,000 |  |  |  |
Estimated grant-date fair value per option pricing model | $ 17.33 |  |  |  |
Stock awards vesting term |  | These stock options shall vest in equal installments on each of August 1, 2021 and August 1, 2022, subject to the CEO’s continuous employment with, or performance of services for, the Company. |  |  |
Requisite service period for estimated grant-date fair value of stock awards |  | Aug. 01, 2022 |  |  |
[1] | Inclusive of 780,000 stock options awarded to our Chief Executive Officer and President, or CEO, during November 2017. The estimated grant-date fair value per option, using a Black-Scholes option pricing model was $17.33. These stock options shall vest in equal installments on each of August 1, 2021 and August 1, 2022, subject to the CEO’s continuous employment with, or performance of services for, the Company. The estimated grant-date fair value of this award will be amortized on a straight-line basis over the requisite service period through August 1, 2022.

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- Definition Description of service or performance condition required to be met for earning right to award under share-based payment arrangement. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement. + References No definition available. + Details
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