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Stock Based Compensation - Summary of Stock Option Activity (Parenthetical) (Details) - 2010 SIP and 2019 SIP - shares | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Shares not yet awarded Granted | 822,982 | 1,014,269 | 1,123,408
Potential Payout | 365,606 | 501,384 | 576,886
Targeted payout | 100.00% | 100.00% | 100.00%
Tranche One |  |  |
Potential Payout | 20,611 |  |
Tranche Two |  |  |
Potential Payout | 15,850 |  |
Tranche Three |  |  |
Potential Payout | 56,226 |  |
Maximum |  |  |
Performance of final target percentage | 200.00% | 200.00% | 200.00%
Maximum | Tranche One |  |  |
Performance of final target percentage | 120.00% |  |
Maximum | Tranche Two |  |  |
Performance of final target percentage | 150.00% |  |
Maximum | Tranche Three |  |  |
Performance of final target percentage | 150.00% |  |
Minimum |  |  |
Performance of final target percentage | 0.00% | 0.00% | 0.00%
Minimum | Tranche One |  |  |
Performance of final target percentage | 0.00% |  |
Minimum | Tranche Two |  |  |
Performance of final target percentage | 0.00% |  |
Minimum | Tranche Three |  |  |
Performance of final target percentage | 50.00% |  |

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