Leases (Tables)

9 Months Ended

Sep. 30, 2020

Leases [Abstract]

Components of Lease Expense

The following table presents components of lease expense for the three and nine months ended September 30, 2020 and 2019:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in thousands)	2020		2019		2020		2019
Operating lease expense	$	3,563	$	4,047	$	10,991	$	11,749
Short-term lease expense(a)	24,502		17,786		64,823		50,843
	28,065		21,833		75,814		62,592
Less: Sublease income	193		263		851		784
Total lease expense	$	27,872	$	21,570	$	74,963	$	61,808

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(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:

(dollars in thousands)	Balance Sheet Line Item	As of September 30, 2020			As of December 31, 2019
Assets
ROU assets	Other assets	$	37,359		$	40,156
Total lease assets		$	37,359		$	40,156
Liabilities
Current lease liabilities	Accrued expenses and other current liabilities	$	9,829		$	11,392
Long-term lease liabilities	Other long-term liabilities	30,668			31,900
Total lease liabilities		$	40,497		$	43,292
Weighted-average remaining lease term		4.8 years			5.0 years
Weighted-average discount rate		6.94		%	5.96		%

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

	Nine Months Ended September 30,
(in thousands)	2020		2019
Operating cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$	(11,026)	$	(11,586)
Non-cash activity:
ROU assets obtained in exchange for lease liabilities	$	6,251	$	7,621

Maturity of Operating Lease Liabilities on an Undiscounted Basis

The following table presents maturities of operating lease liabilities on an undiscounted basis as of September 30, 2020:

Year (in thousands)	Operating Leases
2020 (excluding the nine months ended September 30, 2020)	$	3,612
2021	11,119
2022	9,773
2023	7,833
2024	5,765
Thereafter	10,086
Total lease payments	48,188
Less: Imputed interest	7,691
Total	$	40,497