Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities
Net income	$ 896	$ 13,580
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of intangible assets	16,837	21,810
Non-cash operating lease expense	4,113	4,330
Stock-based compensation	6,127	6,498
Amortization of prepaid debt fees	839	2,695
Deferred taxes, net	(4,362)	2,109
Loss on sale of business	2,221	1,392
Restructuring, non-cash	390	(45)
Other adjustments, net	137	391
Changes in operating assets and liabilities, net of acquisition and sale of business:
Accounts receivable	(8,816)	(2,078)
Inventories	(6,345)	9,008
Other current assets	(11,899)	15,692
Other long-term assets	(2,887)	(7,627)
Accounts payable, other current liabilities, and taxes payable	14,065	(26,978)
Wages and benefits payable	(26,185)	5,458
Unearned revenue	35,320	18,050
Warranty	(928)	(1,382)
Other operating, net	(11,932)	(12,948)
Net cash provided by operating activities	7,591	49,955
Investing activities
Proceeds from divestiture of businesses	55,933	2,842
Acquisitions of property, plant, and equipment	(5,369)	(11,412)
Business acquisitions, net of cash and cash equivalents acquired	23	0
Other investing, net	362	2,764
Net cash provided (used) in investing activities	50,949	(5,806)
Financing activities
Proceeds from borrowings	0	460,000
Payments on debt	0	(475,000)
Issuance of common stock	784	2,238
Proceeds from common stock offering	0	389,419
Proceeds from sale of warrants	0	45,349
Purchases of convertible note hedge contracts	0	(84,139)
Repurchase of common stock	(16,972)	0
Prepaid debt fees	(695)	(11,722)
Other financing, net	(222)	(1,564)
Net cash (used in) provided by financing activities	(17,105)	324,581
Effect of foreign exchange rate changes on cash and cash equivalents	(17)	(1,071)
Increase in cash and cash equivalents	41,418	367,659
Cash and cash equivalents at beginning of period	162,579	206,933
Cash and cash equivalents at end of period	203,997	574,592
Supplemental disclosure of cash flow information:
Income taxes, net	1,740	2,147
Interest	$ 514	$ 3,193