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Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2020

Supplemental Cash Flow Information [Abstract]

Consolidated statements of cash flows

The changes in assets and liabilities included in operating cash flow follow:

			Year Ended December 31,
(in thousands)			2020			2019			2018
(Increase) decrease in:
Accounts and notes receivable, net			$	138,388		$	210,419		$	(40,632)
Contract assets			280,360			207,467			(83,774)
Other current assets			3,893			(80,248)			168,021
Other assets			109,405			100,527			(25,424)
Increase (decrease) in:
Accounts payable			(343,113)			(46,873)			176,335
Contract liabilities			(53,580)			202,359			(307,844)
Accrued liabilities			(11,829)			29,880			(75,878)
Other liabilities			(93,723)			9,496			(38,536)
Increase (decrease) in cash due to changes in assets and liabilities			$	29,801		$	633,027		$	(227,732)
Cash paid during the year for:
Interest			$	65,641		$	71,938		$	66,514
Income taxes (net of refunds)			65,188			204,080			(28,408)

Our cash flow information for 2020, 2019 and 2018 included the following activities related to AMECO Disc Ops:

						Year Ended December 31,
(in thousands)						2020						2019			2018
Impairment expense - Disc Ops						$	145,700					$	—					$	—
Depreciation of fixed assets						—						44,295						72,137
Amortization of stock-based awards						56						123						103
Capital expenditures						(23,430)						(68,048)						(40,856)

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