CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - UNAUDITED - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
OPERATING CASH FLOW
Net earnings (loss)	$ (138,472)	$ (251,072)
Adjustments to reconcile net earnings (loss) to operating cash flow:
Impairment expense - Cont Ops	26,392	102,365
Impairment expense - Disc Ops	126,285	295,239
Depreciation	59,666	76,619
Amortization of intangibles	827	2,673
(Earnings) loss from equity method investments, net of distributions	(7,684)	(2,005)
(Gain) loss on sales of assets incl. AMECO-North America	9,479	9,952
Loss on debt repurchases	19,606	0
Stock-based compensation	24,989	11,571
Deferred taxes	26,836	(23,673)
Net retirement plan accrual (contributions)	(12,237)	(8,507)
Changes in assets and liabilities	(352,566)	(63,904)
Other	(2,670)	(5,018)
Operating cash flow	(219,549)	144,240
INVESTING CASH FLOW
Purchases of marketable securities	(73,449)	(23,589)
Proceeds from sales and maturities of marketable securities	29,702	13,339
Capital expenditures	(54,550)	(80,786)
Proceeds from sales of assets incl. AMECO-North America	125,374	54,849
Investments in partnerships and joint ventures	(79,847)	(25,252)
Other	(12,169)	4,690
Investing cash flow	(64,939)	(56,749)
FINANCING CASH FLOW
Proceeds from issuance of CPS	582,000	0
Purchases and retirement of debt	(525,212)	0
Debt extinguishment costs	(1,503)	0
Dividends paid (on CPS in 2021 and common stock in 2020)	(9,425)	(28,720)
Other borrowings (debt repayments)	(6,673)	13,527
Distributions paid to NCI	(20,158)	(19,288)
Capital contributions by NCI	201,511	82,109
Taxes paid on vested restricted stock	(4,353)	(1,313)
Other	1,903	(356)
Financing cash flow	218,090	45,959
Effect of exchange rate changes on cash	(6,868)	(36,867)
Increase (decrease) in cash and cash equivalents	(73,266)	96,583
Cash and cash equivalents at beginning of period	2,198,781	1,997,199
Cash and cash equivalents at end of period	$ 2,125,515	$ 2,093,782