Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Components of Lease Expense

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

	Year Ended December 31,
	2020			2019
Operating lease expense
Operating lease cost	$	51,828		$	51,072
Variable lease cost		4,366			3,387
Short-term lease cost		1,056			169
Sublease income		(5,052	)		(5,743	)
Finance lease expense
Amortization of right-of-use assets		1,023			—
Interest on lease liabilities		154			—
Total lease expense	$	53,375		$	48,885

Supplemental Cash Flow Information Related to Leases

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

	Year Ended December 31,
	2020		2019
Operating cash outflow from operating leases	$	56,395	$	54,993
Operating cash outflow from finance leases	$	138	$	—
Financing cash outflow from finance leases	$	709	$	—
Right-of-use assets obtained in exchange for operating lease obligations	$	82,662	$	184,502
Right-of-use assets obtained in exchange for finance lease obligations	$	9,206	$	—

Maturities of Lease Liabilities

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

Year Ending December 31,	Operating Leases		Finance Leases
2021	$	49,045	$	2,270
2022		34,617		2,267
2023		23,948		2,183
2024		19,064		2,085
2025		14,152		1,469
Thereafter		36,898		313
Total		177,724		10,587
Less: Finance charges		22,116		911
Total principal liability	$	155,608	$	9,676