CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Cash flows from operating activities:
Net loss	$ (11,797)	$ (23,167)	$ (38,700)	$ (47,305)
Adjustments to reconcile net loss to net cash from operating activities:
Amortization of deferred implementation, solution and other costs			19,851	19,184
Depreciation and amortization			52,819	53,764
Amortization of debt issuance costs			1,517	1,608
Amortization of premiums and discounts on investments			(852)	(2,791)
Stock-based compensation expense			69,456	59,819
Deferred income taxes			2,074	(120)
Gain on extinguishment of debt			0	(19,312)
Lease impairments			1,608	3,982
Other non-cash items			(377)	204
Changes in operating assets and liabilities:
Accounts receivable, net			(14,793)	2,605
Prepaid expenses and other current assets			(5,937)	(3,818)
Deferred solution and other costs			(9,110)	(12,955)
Deferred implementation costs			(12,769)	(11,496)
Contract assets, net			4,102	3,427
Other long-term assets			4,557	3,063
Accounts payable			(6,311)	5,115
Accrued liabilities			1,696	(8,742)
Deferred revenues			30,520	(5,452)
Deferred rent and other long-term liabilities			(6,635)	(7,065)
Net cash provided by operating activities			92,716	33,715
Cash flows from investing activities:
Purchases of investments			(67,347)	(76,820)
Maturities of investments			75,555	179,379
Purchases of property and equipment			(5,253)	(4,568)
Capitalized software development costs			(17,589)	(19,322)
Net cash provided by (used in) investing activities			(14,634)	78,669
Cash flows from financing activities:
Payment for maturity of 2023 convertible notes			0	(10,908)
Payment for repurchases of convertible notes			0	(149,640)
Proceeds from capped calls related to convertible notes			0	139
Debt issuance costs related to revolving credit agreement			(942)	0
Proceeds from the exercise of stock options and ESPP			11,448	4,322
Net cash provided by (used in) financing activities			10,506	(156,087)
Effect of exchange rate changes on cash, cash equivalents and restricted cash			(72)	(137)
Net increase (decrease) in cash, cash equivalents and restricted cash			88,516	(43,840)
Cash, cash equivalents and restricted cash, beginning of period			233,632	201,902	$ 201,902
Cash, cash equivalents and restricted cash, end of period	$ 322,148	$ 158,062	322,148	158,062	$ 233,632
Supplemental disclosure of non-cash investing and financing activities:
Property and equipment acquired and included in accounts payable and accrued liabilities			930	472
Stock-based compensation for capitalized software development			$ 2,270	$ 2,423