Supplemental Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2021

Supplemental Cash Flow Elements [Abstract]

Net Effects of Changes in Operating Assets and Liabilities, Net, on Cash Flows from Operating Activities

The net effects of changes in operating assets and liabilities, net of non-cash transactions, on cash flows from operating activities are as follows (in thousands):

	Three Months Ended
	March 31,
	2021		2020
Accounts and notes receivable	$	35,521	$	122,330
Contract assets	(62,278)		16,372
Inventories	(435)		(4,368)
Prepaid expenses and other current assets	9,948		84,078
Accounts payable and accrued expenses and other non-current liabilities	(4,780)		(110,394)
Contract liabilities	(29,225)		(12,886)
Other, net	(8,200)		(5,662)
Net change in operating assets and liabilities, net of non-cash transactions	$	(59,449)	$	89,470

Reconciliation of Cash, Cash Equivalents, and Restricted Cash and Additional Supplemental Cash Flow Information

Reconciliations of cash, cash equivalents, and restricted cash reported within the condensed consolidated balance sheets that sum to the total of such amounts shown in the statements of cash flows are as follows (in thousands):

	March 31,
	2021		2020
Cash and cash equivalents	$	200,218	$	377,205
Restricted cash included in “Prepaid expenses and other current assets”	1,518		3,514
Restricted cash included in “Other assets, net”	879		919
Total cash, cash equivalents, and restricted cash reported in the statements of cash flows	$	202,615	$	381,638

	December 31,
	2020		2019
Cash and cash equivalents	$	184,620	$	164,798
Restricted cash included in “Prepaid expenses and other current assets”	1,275		4,026
Restricted cash included in “Other assets, net”	913		921
Total cash, cash equivalents, and restricted cash reported in the statements of cash flows	$	186,808	$	169,745

Additional supplemental cash flow information is as follows (in thousands):

	Three Months Ended
	March 31,
	2021		2020
Cash (paid) received during the period for —
Interest paid	$	(4,039)	$	(13,272)
Income taxes paid	$	(4,602)	$	(54,221)
Income tax refunds	$	6,137	$	2,339

Supplemental Cash Flow Information Related to Leases

Supplemental cash flow information related to leases is as follows (in thousands):

	Three Months Ended
	March 31,
	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(27,610)	$	(29,482)
Operating cash flows from finance leases	$	(27)	$	(17)
Financing cash flows from finance leases	$	(249)	$	(201)
Lease assets obtained in exchange for lease liabilities:
Operating leases	$	17,927	$	29,693
Finance leases	$	1,505	$	866