Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Employee Benefit Plans

The following table presents our participation in these plans (dollars in thousands):

		Pension Protection Act (“PPA”) Certified Zone Status (1)			Contributions
Pension Trust Fund	Pension Plan Employer Identification Number	2023	2022	FIP / RP Status Pending / Implemented (2)	2023		2022		2021		Surcharge Imposed	Expiration Date of Collective Bargaining Agreement (3)
Operating Engineers Pension Trust Fund	95-6032478	Green	Yellow	No	$	5,357	$	4,768	$	5,266	No	6/30/2025
Locals 302 and 612 IUOE-Employers Construction Industry Retirement Plan	91-6028571	Green	Green	No	6,520		5,204		4,744		No	5/31/2024 5/31/2025 3/31/2026
Pension Trust Fund for Operating Engineers	94-6090764	Yellow	Yellow	Yes	10,434		9,783		10,095		No	6/30/2024 10/31/2024 3/31/2025 3/31/2026 6/30/2026 9/30/2026 3/31/2027
All other funds (48 as of December 31, 2023)					20,466		18,270		21,517
			Total contributions:		$	42,777	$	38,025	$	41,622

(1)The most recent PPA zone status available in 2023 and 2022 is for the plan’s year-end during 2022 and 2021, respectively. The zone status is based on information that we received from the plan and is certified by the plan’s actuary. Among other factors, plans in the red zone are generally less than 65 percent funded, plans in the orange zone are less than 80 percent funded and have an Accumulated Funding Deficiency in the current year or projected into the next six years, plans in the yellow zone are less than 80 percent funded, and plans in the green zone are at least 80 percent funded.

(2)The “FIP/RP Status Pending/Implemented” column indicates plans for which a financial improvement plan (“FIP”) or a rehabilitation plan (“RP”) is either pending or has been implemented.

(3)Lists the expiration date(s) of the collective-bargaining agreement(s) to which the plans are subject. Pension trust funds with a range of expiration dates have various collective bargaining agreements.