Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities
Net income	$ 13,580	$ 9,162
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	21,810	24,031
Non-cash operating lease expense	4,330	5,496
Stock-based compensation	6,498	8,482
Amortization of prepaid debt fees	2,695	1,007
Deferred taxes, net	2,109	4,062
Loss on sale of business	1,392	0
Restructuring, non-cash	(45)	(955)
Other adjustments, net	391	(874)
Changes in operating assets and liabilities, net of sale of business:
Accounts receivable	(2,078)	1,185
Inventories	9,008	(543)
Other current assets	15,692	(4,526)
Other long-term assets	(7,627)	(6,501)
Accounts payable, other current liabilities, and taxes payable	(26,978)	135
Wages and benefits payable	5,458	(19,977)
Unearned revenue	18,050	17,395
Warranty	(1,382)	(4,250)
Other operating, net	(12,948)	(14,435)
Net cash provided by operating activities	49,955	18,894
Investing activities
Payments for (Proceeds from) Businesses and Interest in Affiliates	2,842	0
Acquisitions of property, plant, and equipment	(11,412)	(12,602)
Other investing, net	2,764	3,345
Net cash used in investing activities	(5,806)	(9,257)
Financing activities
Proceeds from borrowings	460,000	400,000
Payments on debt	(475,000)	0
Issuance of common stock	2,238	2,911
Proceeds from common stock offering	389,419	0
Proceeds from sale of warrants	45,349	0
Payments for Hedge, Financing Activities	(84,139)	0
Repurchase of common stock	0	(664)
Prepaid debt fees	(11,722)	(175)
Other financing, net	(1,564)	(335)
Net cash provided by financing activities	324,581	401,737
Effect of foreign exchange rate changes on cash and cash equivalents	(1,071)	(6,758)
Increase in cash and cash equivalents	367,659	404,616
Cash and cash equivalents at beginning of period	206,933	149,904
Cash and cash equivalents at end of period	574,592	554,520
Supplemental disclosure of cash flow information:
Income taxes, net	2,147	(5,370)
Interest	$ 3,193	$ 14,804