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Long-term Equity-based Compensation - Schedule of Share-based Compensation, Nonemployee Director Deferred Stock Unit Award Plan (Details) | 12 Months Ended
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Dec. 31, 2020 $ / shares shares
Number of DSUs |
Vested Balance at Beginning of the Year (in shares) | shares | 44,820
Reduction for Shares Issued on Conversion (in shares) | shares | 0
Vested Balance at December 31, 2019 (in shares) | shares | 44,820
Weighted- average Grant-date Fair Value Per DSU |
Vested Balance at Beginning of the Year (in dollars per share) | $ / shares | $ 44.74
Reduction for Shares Issued on Conversion (in dollars per share) | $ / shares | 0
Vested Balance at December 31, 2019 (in dollars per share) | $ / shares | $ 44.74

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Deferred Stock Units, Outstanding [Abstract] + References No definition available. + Details
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- Definition Number of share units vested and outstanding. + References No definition available. + Details
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- Definition Weighted average price at which guarantees can acquire the stock units issued under the deferred stock unit plan. + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Deferred Stock Units, Outstanding, Weighted Average Exercise Price [Abstract] + References No definition available. + Details
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- Definition Number of share units issued on conversion + References No definition available. + Details
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- Definition Weighted average per unit amount for the shares issued on conversion. + References No definition available. + Details
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