Stock Incentive Compensation and Employee Benefit Plans - Equity Compensation Other than Options (Details) - $ / shares	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Performance Shares
Number of Shares [Roll Forward]
Nonvested, beginning balance (in shares)	191,264	141,068	151,714
Awards granted (in shares)	160,796	69,548	55,876
Awards vested (in shares)	(38,846)	0	(49,792)
Awards forfeited (in shares)	(26,994)	(19,352)	(16,730)
Nonvested, ending balance (in shares)	286,220	191,264	141,068
Weighted Average Grant Date Fair Value
Nonvested, beginning balance (in usd per share)	$ 159.07	$ 163.98	$ 140.96
Awards granted (in usd per share)	211.18	145.49	162.61
Awards vested (in usd per share)	170.40	0	130.73
Awards forfeited (in usd per share)	0	0	0
Nonvested, ending balance (in usd per share)	$ 185.73	$ 159.07	$ 163.98
Total Restricted Stock Awards
Number of Shares [Roll Forward]
Nonvested, beginning balance (in shares)	733,811	643,933	613,407
Awards granted (in shares)	388,058	367,608	263,077
Awards vested (in shares)	(291,224)	(254,935)	(217,775)
Awards forfeited (in shares)	(15,278)	(22,795)	(14,776)
Nonvested, ending balance (in shares)	815,367	733,811	643,933
Weighted Average Grant Date Fair Value
Nonvested, beginning balance (in usd per share)	$ 150.31	$ 153.32	$ 143.54
Awards granted (in usd per share)	199.65	143.92	167.71
Awards vested (in usd per share)	151.57	148.83	142.77
Awards forfeited (in usd per share)	0	149.01	158.97
Nonvested, ending balance (in usd per share)	$ 172.91	$ 150.31	$ 153.32
Employee Restricted Stock Awards
Number of Shares [Roll Forward]
Nonvested, beginning balance (in shares)	712,796	623,332	592,747
Awards granted (in shares)	378,994	354,887	252,625
Awards vested (in shares)	(279,363)	(242,628)	(207,264)
Awards forfeited (in shares)	(15,278)	(22,795)	(14,776)
Nonvested, ending balance (in shares)	797,149	712,796	623,332
Weighted Average Grant Date Fair Value
Nonvested, beginning balance (in usd per share)	$ 150.19	$ 153.02	$ 143.14
Awards granted (in usd per share)	199.24	143.86	167.92
Awards vested (in usd per share)	151.15	148.30	142.52
Awards forfeited (in usd per share)	0	149.01	158.97
Nonvested, ending balance (in usd per share)	$ 172.74	$ 150.19	$ 153.02
Non-Employee Director Restricted Stock Awards
Number of Shares [Roll Forward]
Nonvested, beginning balance (in shares)	21,015	20,601	20,660
Awards granted (in shares)	9,064	12,721	10,452
Awards vested (in shares)	(11,861)	(12,307)	(10,511)
Awards forfeited (in shares)	0	0	0
Nonvested, ending balance (in shares)	18,218	21,015	20,601
Weighted Average Grant Date Fair Value
Nonvested, beginning balance (in usd per share)	$ 154.40	$ 162.60	$ 155.03
Awards granted (in usd per share)	215.79	145.77	162.61
Awards vested (in usd per share)	161.56	159.20	147.72
Awards forfeited (in usd per share)	0	0	0
Nonvested, ending balance (in usd per share)	$ 180.70	$ 154.40	$ 162.60

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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