Leases (Tables)

12 Months Ended

Dec. 31, 2021

The following table presents components of lease expense for the years ended December 31, 2021 and 2020:


	For the year ended December 31,
(in thousands)	2021		2020
Operating lease expense	$	14,733	$	14,547
Short-term lease expense(a)	72,047		87,969
	86,780		102,516
Less: Sublease income	697		1,026
Total lease expense	$	86,083	$	101,490

(a)Short-term lease expense includes all leases with lease terms ranging from less than one month 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:


		As of December 31,
(dollars in thousands)	Balance Sheet Line Item	2021			2020
Assets
ROU assets	Other assets	$	53,462		$	55,897
Total lease assets		$	53,462		$	55,897
Liabilities
Current lease liabilities	Accrued expenses and other current liabilities	$	7,481		$	7,661
Long-term lease liabilities	Other long-term liabilities	50,057			51,336
Total lease liabilities		$	57,538		$	58,997
Weighted-average remaining lease term		12.0 years			12.5 years
Weighted-average discount rate		9.44		%	9.22		%

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


	As of December 31,
(in thousands)	2021		2020
Operating cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$	(13,799)	$	(14,591)
Non-cash activity:
ROU assets obtained in exchange for lease liabilities	$	6,979	$	29,244

Maturity of Leases Liabilities on an Undiscounted Basis

The following table presents maturities of operating lease liabilities on an undiscounted basis as of December 31, 2021:


Year (in thousands)	Operating Leases
2022	$	12,372
2023	9,622
2024	7,673
2025	6,803
2026	5,640
Thereafter	60,833
Total lease payments	102,943
Less: Imputed interest	45,405
Total	$	57,538