CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income (loss)	$ (8,228)	$ 33,466
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Depreciation	61,512	59,857
Amortization	15,672	5,792
Deferred income tax benefit	(655)	(3,823)
Equity income of unconsolidated entities, net	(167)	(70)
Gain on sale from discontinued business	(18,371)	0
Other, net	(2,244)	2,561
Changes in assets and liabilities, net of acquisitions and dispositions of businesses:
Accounts receivable	16,534	(27,034)
Inventories	(16,666)	(20,497)
Contract assets	(28,934)	(69)
Right-of-use assets	11,834	7,228
Accounts payable	(8,119)	10,917
Accrued interest payable	(2,940)	285
Accrued compensation	(4,767)	(14,525)
Advances on contracts	35,836	(10,381)
Operating lease liabilities	(11,596)	(6,894)
Retirement plan liabilities, net	(19,026)	(13,146)
Income taxes payable - Gain on sale of discontinued businesses	3,467	0
Other assets and liabilities	(1,621)	(18,295)
Net cash provided by operating activities	21,521	5,372
Gain on disposition of business	(18,371)
Cash flows from investing activities:
Purchases of property, plant and equipment	(51,213)	(91,201)
Purchases of businesses, net of cash acquired	(442,604)	(584,485)
Proceeds from Divestiture of Businesses	37,219	0
Proceeds from sales of assets	3,952	2,205
Expenditures for intangible assets	(42)	(525)
Payments for interest rate swap terminations	0	(2,758)
Other investing activities, net	59	0
Payments for (Proceeds from) Derivative Instrument, Investing Activities	(765)	691
Net cash used by investing activities	(451,864)	(677,455)
Cash flows from financing activities:
Short-term borrowings, net	2,677	84
Current maturities and long-term debt:
Additions	528,601	740,360
Reductions	(62,406)	(3,333)
Sale of noncontrolling interests	0	876
Dividends paid to noncontrolling interests	0	(3,098)
Stock-based compensation - Employee taxes paid	(4,093)	(11,167)
Deferred financing costs	1,928	9,464
Other financing activities, net	(1,371)	0
Net cash provided by financing activities	461,480	714,258
Effect of exchange rate changes on cash and cash equivalents, including restricted cash	(6,818)	(242)
Net increase in cash and cash equivalents, including restricted cash	24,319	41,933
Cash and cash equivalents, including restricted cash, at beginning of period	59,732	67,146
Cash and cash equivalents, including restricted cash, at end of period	84,051	109,079
Change in accrual for purchases of property, plant and equipment included in accounts payable	$ 1,085	12,804
Gain (loss) on Extinguishment of debt, Cash Flow		$ 0