Employees, Retirement and Incentive Plans - Performance Units (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement, Nonvested [Roll Forward]
Payments for repurchase of common units	$ 1,727	$ 1,958	$ 698
Performance Shares
Share-based Compensation Arrangement, Nonvested [Roll Forward]
Units outstanding at beginning of period (in shares)	76,719
Granted (in shares)	10,698
Vesting and transfer of common units to recipients (in shares)	(35,441)
Forfeited (in shares)	(9,124)
Units outstanding at end of period (in shares)	42,852	76,719
Grant date fair value of units vested and transferred	$ 800	$ 400	$ 400
Value of performance units vested and expected to vest	700
Unrecognized compensation related to nonvested units	$ 500
Weighted average recognition period	1 year 8 months 12 days
Long-term Incentive Plan \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	3 years
Range of performance units earned, minimum	0.00%
Range of performance units earned, maximum	200.00%
Share-based Compensation Arrangement, Nonvested [Roll Forward]
Payments for repurchase of common units	$ 1,700

Performance Period

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Range Of Performance Units Earned, Based On Performance Units Granted, Maximum

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Range Of Performance Units Earned, Based On Performance Units Granted, Minimum

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

The cash outflow to reacquire common and preferred stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
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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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- Definition

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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- Definition

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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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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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- Definition

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

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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