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Employee Stock Purchase and Equity-Based Compensation Plans - Schedule of Amount Paid for Cash Settled Awards (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Total cash settled awards | $ 39,945 | $ 11,906 | $ 10,110
Stock Appreciation Rights |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Total cash settled awards | 26,920 | 5,261 | 4,576
Long-Term Growth Units |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Total cash settled awards | 3,617 | 1,108 | 1,095
Restricted Award Units |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Total cash settled awards | $ 9,408 | $ 5,537 | $ 4,439

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- Definition Amount of cash paid to settle liability for award under share-based payment arrangement. + 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)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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