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Equity Based Compensation Plans - Restricted Stock Activity and LITP Units (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Restricted Stock |  |  |  |
Total Unvested Units |  |  |  |
Unvested at beginning of year (in shares) | 101,701 | 182,915 | 159,401 | 132,603
Granted (in shares) | 2,315 | 72,838 | 50,349 |
Vested (in shares) | (37,075) | (44,945) | (22,387) |
Forfeited and canceled (in shares) | (46,454) | (4,379) | (1,164) |
Unvested at end of year (in shares) | 101,701 | 182,915 | 159,401 | 132,603
Weighted- average grant price |  |  |  |
Unvested at beginning of year (in dollars per share) | $ 222.90 | $ 251.03 | $ 214.34 |
Granted (in dollars per share) | 220.40 | 215.73 | 337.52 |
Vested (in dollars per share) | 247.07 | 306.25 | 229.90 |
Forfeited and canceled (in dollars per share) | 259.71 | 272.12 | 219.30 |
Unvested at end of year (in dollars per share) | $ 197.22 | $ 222.90 | $ 251.03 | $ 214.34
Long Term Incentive Plans - Z Units and 2014 LTIP Units |  |  |  |
Total Unvested Units |  |  |  |
Unvested at beginning of year (in shares) | 0 | 0 | 0 | 0
Granted (in shares) | 0 | 0 | 0 |
Vested (in shares) | 0 | 0 | 0 |
Converted (in shares) | 0 | 0 | 0 |
Forfeited and canceled (in shares) | 0 | 0 | 0 |
Unvested at end of year (in shares) | 0 | 0 | 0 | 0
Weighted- average grant price |  |  |  |
Unvested at beginning of year (in dollars per share) | $ 84.47 | $ 84.47 | $ 84.47 |
Unvested at end of year (in dollars per share) | $ 86.16 | $ 84.47 | $ 84.47 | $ 84.47
Total Vested Units |  |  |  |
Vested, beginning balance (in shares) | 106,137 | 106,137 | 106,137 |
Vested, units granted (in shares) | 0 | 0 | 0 |
Vested, units vested (in shares) | 0 | 0 | 0 |
Converted (in shares) | (8,500) | 0 | 0 |
Cancelled (in shares) | 0 | 0 | 0 |
Vested, ending balance (in shares) | 97,637 | 106,137 | 106,137 | 106,137
Total Outstanding Units |  |  |  |
Total outstanding units, beginning balance (in shares) | 106,137 | 106,137 | 106,137 |
Total outstanding units, granted (in shares) | 0 | 0 | 0 |
Total outstanding units, vested (in shares) | 0 | 0 | 0 |
Total outstanding units, converted (in shares) | (8,500) | 0 | 0 |
Total outstanding units, cancelled (in shares) | 0 | 0 | 0 |
Total outstanding units, ending balance (in shares) | 97,637 | 106,137 | 106,137 | 106,137
Weighted- average Remaining Contractual Life (years) | 1 year | 1 year 7 months 6 days | 2 years 7 months 6 days | 3 years 7 months 6 days

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