Leases (Tables)

6 Months Ended

Jun. 30, 2020

Leases [Abstract]

Components Of Lease Expense

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2020		2019		2020		2019
Operating lease expense	$	3,661	$	3,921	$	7,428	$	7,702
Short-term lease expense(a)		23,056		16,486		40,321		33,057
		26,717		20,407		47,749		40,759
Less: Sublease income		329		262		658		521
Total lease expense	$	26,388	$	20,145	$	47,091	$	40,238

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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:

		As of June 30,		As of December 31,
(dollars in thousands)	Balance Sheet Line Item	2020		2019
Assets
ROU assets	Other assets	$	38,909	$	40,156
Total lease assets		$	38,909	$	40,156
Liabilities
Current lease liabilities	Accrued expenses and other current liabilities	$	10,255	$	11,392
Long-term lease liabilities	Other long-term liabilities		31,869		31,900
Total lease liabilities		$	42,124	$	43,292
Weighted-average remaining lease term (in years)			5.0		5.0
Weighted-average discount rate			6.77%		5.96%

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

	Six Months Ended
	June 30,
(in thousands)	2020		2019
Operating cash flow information:
Cash paid for amounts included in the measurement of lease liabilities	$	(7,386)	$	(7,622)
Non-cash activity:
ROU assets obtained in exchange for lease liabilities	$	4,923	$	6,040

Maturity Of Leases Liabilities On An Undiscounted Basis

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

Year (in thousands)	Operating Leases
2020 (excluding the six months ended June 30, 2020)	$	7,039
2021		10,588
2022		9,294
2023		7,582
2024		5,701
Thereafter		10,053
Total lease payments		50,257
Less: Imputed interest		8,133
Total	$	42,124