Leases (Tables)

6 Months Ended

Jun. 30, 2022

Leases [Abstract]

Components of Lease Expense

The following table presents components of lease expense for the three and six months ended June 30, 2022 and 2021:

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2022		2021		2022		2021
Operating lease expense	$	3,912	$	3,707	$	8,069	$	7,425
Short-term lease expense(a)	12,991		18,301		27,435		39,426
	16,903		22,008		35,504		46,851
Less: Sublease income	190		176		380		346
Total lease expense	$	16,713	$	21,832	$	35,124	$	46,505

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(a)Short-term lease expense includes all leases with lease terms of up to one year. Short-term leases include, among other things, construction equipment rented on an as-needed basis as well as temporary housing.

Supplemental Financial Statement Information Related to Leases

The following table presents supplemental balance sheet information related to operating leases:

(dollars in thousands)	Balance Sheet Line Item	As of June 30, 2022			As of December 31, 2021
Assets
Right-of-use assets	Other assets	$	56,018		$	53,462
Total lease assets		$	56,018		$	53,462
Liabilities
Current lease liabilities	Accrued expenses and other current liabilities	$	7,420		$	7,481
Long-term lease liabilities	Other long-term liabilities	53,025			50,057
Total lease liabilities		$	60,445		$	57,538
Weighted-average remaining lease term		11.8 years			12.0 years
Weighted-average discount rate		9.35		%	9.44		%

The following table presents supplemental cash flow information and non-cash activity related to operating leases:

	Six Months Ended June 30,
(in thousands)	2022		2021
Operating cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$	(7,717)	$	(6,855)
Non-cash activity:
Right-of-use assets obtained in exchange for lease liabilities	$	7,887	$	5,780

Maturity of Operating Lease Liabilities on an Undiscounted Basis

The following table presents maturities of operating lease liabilities on an undiscounted basis as of June 30, 2022:

Year (in thousands)	Operating Leases
2022 (excluding the six months ended June 30, 2022)	$	6,409
2023	11,255
2024	8,776
2025	7,869
2026	6,489
Thereafter	65,120
Total lease payments	105,918
Less: Imputed interest	45,473
Total	$	60,445