Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities
Net income (loss)	$ (53,325)	$ 19,968
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	48,230	57,068
Non-cash operating lease expense	9,909	9,481
Stock-based compensation	15,581	13,783
Amortization of prepaid debt fees	2,013	2,402
Deferred taxes, net	5,904	2,076
Restructuring, non-cash	(1,146)	(5,295)
Other adjustments, net	287	(3,471)
Changes in operating assets and liabilities
Accounts receivable	52,031	(29,121)
Inventories	(16,529)	(9,202)
Other current assets	(7,861)	(14,413)
Other long-term assets	(3,919)	6,616
Accounts payable, other current liabilities, and taxes payable	(76,144)	(2,801)
Wages and benefits payable	(11,145)	13,484
Unearned revenue	23,099	14,961
Warranty	(8,417)	(3,270)
Other operating, net	(9,697)	5,797
Net cash provided by operating activities	25,786	78,063
Investing activities
Acquisitions of property, plant, and equipment	(29,049)	(26,511)
Other investing, net	3,520	9,773
Net cash used in investing activities	(29,159)	(16,738)
Financing activities
Proceeds from borrowings	400,000	50,000
Payments on debt	0	(72,188)
Issuance of common stock	4,183	4,001
Repurchase of common stock	0	(25,000)
Prepaid debt fees	(184)	(175)
Other financing, net	(2,036)	(3,165)
Net cash provided by (used in) financing activities	401,963	(46,527)
Effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash	(3,671)	727
Increase in cash, cash equivalents, and restricted cash	394,919	15,525
Cash, cash equivalents, and restricted cash at beginning of period	149,904	122,328
Cash, cash equivalents, and restricted cash at end of period	544,823	137,853
Supplemental disclosure of cash flow information:
Income taxes, net	(2,994)	6,571
Interest	32,149	23,333
Payments for (Proceeds from) Businesses and Interest in Affiliates	(3,630)	0
Gain (Loss) on Disposition of Business	$ 56,915	$ 0