Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating activities
Net loss	$ (149)	$ (145,270)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization of intangible assets	28,427	31,072
Amortization of operating lease right-of-use assets	4,910	0
Stock-based compensation	7,205	8,095
Amortization of prepaid debt fees	1,200	3,386
Deferred taxes, net	(430)	(16,508)
Restructuring, non-cash	96	47
Other adjustments, net	44	(106)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(37,977)	(7,768)
Inventories	(1,659)	(253)
Other current assets	(11,030)	(8,849)
Other long-term assets	334	4,509
Accounts payable, other current liabilities, and taxes payable	12,312	7,826
Wages and benefits payable	8,465	16,438
Unearned revenue	8,235	23,317
Warranty	(2,569)	663
Other operating, net	7,510	58,953
Net cash provided by (used in) operating activities	24,924	(24,448)
Investing activities
Acquisitions of property, plant, and equipment	(11,415)	(17,433)
Business acquisitions, net of cash equivalents acquired	0	(802,488)
Other investing, net	299	100
Net cash used in investing activities	(11,116)	(819,821)
Financing activities
Proceeds from borrowings	30,000	705,938
Payments on debt	(44,063)	(182,395)
Issuance of common stock	1,758	3,384
Payments for Repurchase of Common Stock	8,534	0
Prepaid debt fees	(175)	(24,042)
Other financing, net	(2,229)	(1,046)
Net cash provided by (used in) financing activities	(23,243)	501,839
Effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash	72	563
Decrease in cash, cash equivalents, and restricted cash	(9,363)	(341,867)
Cash, cash equivalents, and restricted cash at beginning of period	122,328	487,335
Cash, cash equivalents, and restricted cash at end of period	112,965	145,468
Supplemental disclosure of cash flow information:
Income taxes, net	3,241	1,498
Interest	$ 16,628	$ 6,878