Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Activities
Net income (loss)	$ (20,371)	$ 5,648	$ 77,849
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	87,319	86,931	72,990
Loss on disposal of property and equipment	2,572	678	433
Share-based compensation expense	55,300	68,247	53,160
Deferred income taxes	(11,047)	(37,316)	(3,272)
Amortization of operating lease right-of-use assets	8,239	12,238	11,941
Impairment and abandonment of operating lease right-of-use assets related to facilities	9,998	9,382	0
Impairment of internal-use and external-use software development costs, net	0	1,275	0
Impairment of certain long-lived assets	1,014	0	0
Amortization of debt issuance costs	4,397	4,164	3,440
Amortization of discount on convertible senior notes	0	0	18,608
Changes in operating assets and liabilities:
Accounts receivable and unbilled receivables	49,150	(60,357)	(40,973)
Inventories	38,016	(30,115)	(25,695)
Prepaid expenses	1,149	(4,671)	(5,678)
Other current assets	(6,821)	6,360	2,801
Investment in sales-type leases	(10,411)	(15,354)	3,346
Prepaid commissions	7,069	4,312	(6,876)
Other long-term assets	2,111	5,027	(3,258)
Accounts payable	(17,525)	(7,754)	29,084
Accrued compensation	(21,461)	2,446	12,312
Accrued liabilities	(10,343)	16,651	34,859
Deferred revenues	24,058	24,469	24,179
Operating lease liabilities	(10,918)	(13,781)	(12,503)
Other long-term liabilities	(401)	(699)	(14,938)
Net cash provided by operating activities	181,094	77,781	231,809
Investing Activities
External-use software development costs	(13,542)	(13,204)	(29,368)
Purchases of property and equipment	(41,474)	(47,536)	(28,967)
Business acquisitions, net of cash acquired	0	(3,392)	(354,163)
Purchase price adjustments from business acquisitions	0	5,463	0
Net cash used in investing activities	(55,016)	(58,669)	(412,498)
Financing Activities
Payments for debt issuance costs for revolving credit facility	(2,967)	0	0
Proceeds from issuances under stock-based compensation plans	23,216	40,182	67,348
Employees’ taxes paid related to restricted stock units	(7,366)	(13,506)	(16,286)
Stock repurchases	0	(52,210)	0
Change in customer funds, net	10,537	4,581	(3,699)
Net cash provided by (used in) financing activities	23,420	(20,953)	47,363
Effect of exchange rate changes on cash and cash equivalents	(1,354)	(944)	(974)
Net increase (decrease) in cash, cash equivalents, and restricted cash	148,144	(2,785)	(134,300)
Cash, cash equivalents, and restricted cash at beginning of period	352,835	355,620	489,920
Cash, cash equivalents, and restricted cash at end of period	500,979	352,835	355,620
Reconciliation of cash, cash equivalents, and restricted cash to the Consolidated Balance Sheets:
Cash and cash equivalents	467,972	330,362	349,051
Restricted cash included in other current assets	33,007	22,473	6,569
Cash, cash equivalents, and restricted cash at end of period	500,979	352,835	355,620
Supplemental cash flow information
Cash paid for interest	1,438	1,438	1,917
Income taxes paid (refunds received), net	20,209	19,005	(1,733)
Supplemental disclosure of non-cash investing activities
Unpaid purchases of property and equipment	877	892	883
Transfers between inventory and property and equipment, net	$ 0	$ 314	$ 1,876