Leases (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Components of Lease Expense

The components of lease expense were as follows (U.S. dollars in thousands):

	Three Months Ended March 31, 2019
Operating lease cost	$	12,861
Short-term lease cost		52
Variable lease cost		1,052
	$	13,965

Supplemental Cash Flow Information Related to Leases

Supplemental cash flow information related to leases was as follows (U.S. dollars in thousands):

	Three Months Ended March 31, 2019
Operating cash outflow from operating leases	$	14,377
ROU assets obtained in exchange for lease obligations		128,704

Maturities of Operating Lease Liabilities

Maturities of lease liabilities were as follows (U.S. dollars in thousands):

Year Ending December 31,	Operating leases
2019	$	43,686
2020		33,522
2021		23,544
2022		13,187
2023		8,542
Thereafter		10,398
Total		132,879
Less: Finance charges		12,899
Total principal liability	$	119,980

Minimum Future Operating Leases and Financing Obligations

Under ASC 840, minimum future operating leases and financing obligations at December 31, 2018 are as follows (U.S. dollars in thousands):

Year Ending December 31,	Operating leases		Finance leases
2019	$	39,358	$	726
2020		27,553		748
2021		20,266		757
2022		11,723		770
2023		9,950		794
Thereafter		7,628		1,148
Total minimum lease payments	$	116,478	$	4,943