Stockholders' Equity - Restricted Stock (Details) - $ / shares	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Time Based Restricted Stock Units
Number of Units
Outstanding at beginning of period (in shares)	12,829
Granted (in shares)	7,991	8,508
Adjustment for dividend (in shares)	26
Vested and distributed (in shares)	(2,718)
Forfeited (in share)	(813)
Outstanding at end of period (in shares)	17,315	8,508
Grant Date Fair Value
Outstanding at beginning of period (in per share)	$ 64.43
Granted (in per share)	76.71	$ 63.15
Vested and distributed (in per share)	63.15
Forfeited (in per share)	63.15
Outstanding at end of period (in per share)	$ 70.26	$ 63.15
Time Based Restricted Stock Units \| Employee
Grant Date Fair Value
Vesting period	3 years
Time Based Restricted Stock Units \| Non-employee directors.
Grant Date Fair Value
Vesting period	1 year
Performance Shares
Number of Units
Outstanding at beginning of period (in shares)	8,136
Granted (in shares)	7,999	8,508
Adjustment for dividend (in shares)	16
Forfeited (in share)	(1,219)
Outstanding at end of period (in shares)	14,932	8,508
Grant Date Fair Value
Outstanding at beginning of period (in per share)	$ 78.97
Granted (in per share)	100.19	$ 79.33
Forfeited (in per share)	79.33
Outstanding at end of period (in per share)	$ 90.22	$ 79.33
Performance Shares \| Employee
Grant Date Fair Value
Vesting period	3 years

Number of stock dividends issued as dividends.

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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.

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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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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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