Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2021

Compensation And Retirement Disclosure [Abstract]

Schedule of Pension plan's assets by asset type

The following table presents the Pension Plan’s assets by asset type as of the dates stated.

	December 31, 2021
	Amount		%
Mutual funds - equity	$	869		75	%
Mutual funds - fixed income		290		25	%
Total	$	1,159		100	%

Summary of Fair value of Qualified trust assets and Funded (Unfunded) status of Pension Plan

The following table provides a reconciliation of changes in the accumulated benefit obligations and fair value of qualified trust assets (Pension Plan only) and a statement of funded (unfunded) status for the Pension Plan and the PRB Plan as of and for the period stated.

	December 31, 2021
	Pension Plan			PRB Plan
Change in benefit obligation
Benefit obligation, beginning of year	$	—		$	—
Assumed in business combination		2,041			65
Service cost		—			—
Interest cost		45			2
Actuarial loss (gain)		34			(9	)
Benefit payments		(971	)		(6	)
Settlement (gain) loss		—			—
Benefit obligation, end of year		1,149			52
Change in plan assets
Fair value of plan assets, beginning of year		—			—
Acquired in business combination		1,330			—
Actual return on plan assets		97			—
Employer contributions		703			6
Benefits payments		(971	)		(6	)
Fair value of plan assets, end of year		1,159			—
Funded (unfunded) status, end of year	$	10		$	(52	)

Schedule of Amounts Recognized in AOCI

	For the year ended December 31, 2021
	Pension Plan		PRB Plan
Amounts recognized in accumulated other comprehensive loss (income)
Net loss (gain)	$	11	$	(9	)
Prior service cost		—		—
Net obligation at transition		—		—
Amount recognized	$	11	$	(9	)

Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (Loss)

Components of net periodic benefit (gain) cost
Service cost	$	—		$	—
Interest cost		45			2
Expected return on plan assets		(73	)		—
Amortization of prior service cost		—			—
Amortization of net obligation at transition		—			—
Recognized net loss due to settlement		—			—
Recognized net actuarial loss		—			—
Net periodic benefit (gain) cost		(28	)		2

Other changes in plan assets and benefit obligations recognized in accumulated other comprehensive (income) loss
Net loss (gain)		11			(9	)
Amortization of prior service cost		—			—
Amortization of net obligation at transition		—			—
Total recognized in other comprehensive loss (income)		11			(9	)
Total recognized in net periodic benefit cost and other comprehensive loss (income)	$	(17	)	$	(7	)

Schedule of assumptions used in the valuation and disclosures for the Pension Plan and the PRB Plan

The following table presents the assumptions used in the valuation of and disclosures for the Pension Plan and the PRB Plan for the period stated.

	December 31, 2021
	Pension Plan			PRB Plan
Discount rate used for net periodic pension cost		2.75	%		2.50	%
Discount rate used for disclosure (range)	1.02% - 3.08%				2.75	%
Expected return on plan assets		7.25	%	N/A
Rate of compensation increase	N/A			N/A
Rate of compensation increase for net periodic    pension cost	N/A			N/A
Expected future interest crediting rate		3.00	%	N/A

Schedule of Expected Benefit Payments

The following table presents the expected benefit payments to be made from the Pension Plan and PRB Plan for the periods following the date stated.

	December 31, 2021
	Pension Plan		PRB Plan
2022	$	1,149	$	6
2023		—		6
2024		—		5
2025		—		5
2026		—		5
2027 - 2031		—		28