Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss	$ (33,170)	$ (30,832)
Adjustments to reconcile net loss to cash flows provided by operating activities:
Depreciation and amortization of property and equipment	3,474	2,921
Amortization of intangible assets	14,334	11,922
Amortization of debt issuance costs	1,854	88
Stock-based compensation	2,976	4,139
Deferred income taxes	(99)	347
Reduction in deferred purchase consideration	(69)	(8,124)
Foreign currency exchange losses	854	352
Changes in operating assets and liabilities:
Accounts receivable	46,156	53,854
Inventory	4,468	3,692
Other operating assets	(478)	(762)
Accounts payable	(27,029)	(6,999)
Accrued expenses and other long-term liabilities	22,310	(13,095)
Deferred revenue	4,351	2,076
Net cash provided by operating activities	39,932	19,579
Cash flows from investing activities:
Purchases of property and equipment	(6,017)	(3,766)
Business acquisitions, net of cash acquired	(346,852)	0
Maturities of marketable securities	0	5,295
Proceeds from the sale of fixed assets	43,500	0
Net cash (used in) provided by investing activities	(309,369)	1,529
Cash flows from financing activities:
Borrowings under revolving line of credit	0	37,000
Principal payments on revolving line of credit	(8,000)	(35,000)
Proceeds from issuance of term debt	403,500	0
Principal payments of long-term debt	(48,750)	0
Payment of deferred purchase consideration	0	(21,876)
Principal payments of finance leases	(338)	(230)
Payment of debt issuance costs	(10,573)	0
Proceeds from the exercise of stock options	5	151
Payment of tax withholding obligations related to net share settlements of restricted stock awards	(792)	(968)
Net cash provided by (used in) financing activities	335,052	(20,923)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(190)	59
Net increase in cash, cash equivalents and restricted cash	65,425	244
Cash and cash equivalents, beginning of year	44,643	43,694
Cash, cash equivalents and restricted cash, end of period	110,068	43,938
Supplemental disclosure of cash flow information:
Interest paid	688	831
Income taxes paid	1,259	777
Income tax refunds received	0	100
Supplemental disclosure of non-cash investing activities:
Capital expenditures incurred, but not yet paid	6,300	399
Acquisition purchase consideration - deferred payments	0	1,700
Shares of common stock issued as purchase consideration	110,180	15,186
Supplemental disclosure of non-cash financing activities:
Total fair value of restricted stock awards, restricted stock units and performance-based stock units on date vested	$ 3,182	$ 4,334