Leases (Tables)

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Components of Lease Expense

	Three Months Ended		Six Months Ended
(in thousands)	June 30, 2019		June 30, 2019
Operating lease expense	$	3,921	$	7,702
Short-term lease expense(a)		16,486		33,057
		20,407		40,759
Less: Sublease income		262		521
Total lease expense	$	20,145	$	40,238

(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, 2019:

		As of June 30,
(dollars in thousands)	Balance Sheet Line Item	2019
Assets
ROU assets	Other assets	$	42,968
Total lease assets		$	42,968
Liabilities
Current lease liabilities	Accrued expenses and other current liabilities	$	11,991
Long-term lease liabilities	Other long-term liabilities		34,002
Total lease liabilities		$	45,993
Weighted-average remaining lease term (in years)			4.7
Weighted-average discount rate			5.85%

The following table presents supplemental cash flow information and non-cash activity related to operating leases for the six months ended June 30, 2019:

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

Maturity of Leases Liabilities on an Undiscounted Basis

Year (in thousands)	Operating Leases
2019 (excluding the six months ended June 30, 2019)	$	7,442
2020		11,987
2021		8,595
2022		7,346
2023		6,129
Thereafter		12,431
Total lease payments		53,930
Less: Imputed interest		7,937
Total	$	45,993

Future Minimum Rent Payments under Non-Cancelable Operating Leases

Year (in thousands)	Operating Leases
2019	$	14,039
2020		10,706
2021		7,464
2022		6,567
2023		5,587
Thereafter		11,662
		56,025
Less: Sublease rental agreements		1,398
Total	$	54,627