Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Net income	$ 5,648	$ 77,849	$ 32,194
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	86,931	72,990	61,067
Loss on disposal of property and equipment	678	433	267
Share-based compensation expense	68,247	53,160	44,697
Deferred income taxes	(37,316)	(3,272)	(6,546)
Amortization of operating lease right-of-use assets	12,238	11,941	10,528
Impairment and abandonment of operating lease right-of-use assets related to facilities	9,382	0	0
Impairment of externally and internally developed capitalized software, net	1,275	0	0
Amortization of debt issuance costs	4,164	3,440	1,597
Amortization of discount on convertible senior notes	0	18,608	4,766
Changes in operating assets and liabilities:
Accounts receivable and unbilled receivables	(60,357)	(40,973)	36,842
Inventories	(30,115)	(25,695)	12,359
Prepaid expenses	(4,671)	(5,678)	(2,081)
Other current assets	6,360	2,801	(6,408)
Investment in sales-type leases	(15,354)	3,346	(2,882)
Prepaid commissions	4,312	(6,876)	(8,057)
Other long-term assets	5,027	(3,258)	(7,675)
Accounts payable	(7,754)	29,084	(6,300)
Accrued compensation	2,446	12,312	11,595
Accrued liabilities	16,651	34,859	4,374
Deferred revenues	24,469	24,179	7,620
Operating lease liabilities	(13,781)	(12,503)	(9,543)
Other long-term liabilities	(699)	(14,938)	7,456
Net cash provided by operating activities	77,781	231,809	185,870
Investing Activities
Software development for external use	(13,204)	(29,368)	(32,024)
Purchases of property and equipment	(47,536)	(28,967)	(22,842)
Business acquisitions, net of cash acquired	(3,392)	(354,163)	(225,000)
Purchase price adjustments from business acquisitions	5,463	0	0
Net cash used in investing activities	(58,669)	(412,498)	(279,866)
Financing Activities
Proceeds from revolving credit facility	0	0	150,000
Repayment of debt and revolving credit facility	0	0	(200,000)
Payments for debt issuance costs for revolving credit facility	0	0	(550)
Proceeds from issuance of convertible senior notes, net of issuance costs	0	0	559,665
Purchase of convertible note hedge	0	0	(100,625)
Proceeds from sale of warrants	0	0	51,290
Proceeds from issuances under stock-based compensation plans	40,182	67,348	54,270
Employees’ taxes paid related to restricted stock units	(13,506)	(16,286)	(8,738)
Stock repurchases	(52,210)	0	(53,035)
Change in customer funds, net	4,581	(3,699)	3,992
Net cash provided by (used in) financing activities	(20,953)	47,363	456,269
Effect of exchange rate changes on cash and cash equivalents	(944)	(974)	437
Net increase (decrease) in cash, cash equivalents, and restricted cash	(2,785)	(134,300)	362,710
Cash, cash equivalents, and restricted cash at beginning of period	355,620	489,920	127,210
Cash, cash equivalents, and restricted cash at end of period	352,835	355,620	489,920
Reconciliation of cash, cash equivalents, and restricted cash to the Consolidated Balance Sheets:
Cash and cash equivalents	330,362	349,051	485,928
Restricted cash included in other current assets	22,473	6,569	3,992
Cash, cash equivalents, and restricted cash at end of period	352,835	355,620	489,920
Supplemental cash flow information
Cash paid for interest	1,438	1,917	522
Income taxes paid (refunds received), net	19,005	(1,733)	10,343
Supplemental disclosure of non-cash investing activities
Unpaid purchases of property and equipment	892	883	405
Transfers between inventory and property and equipment, net	$ 314	$ 1,876	$ 0