Unaudited Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 505,590	$ 400,730
Accounts receivable	17,802	22,843
Prepaid expenses	40,260	34,056
Inventory	887	1,607
Income tax receivable		5,583
Deferred contract costs	102,374	96,378
Current assets before funds held for clients	666,913	561,197
Funds held for clients	2,387,778	2,202,975
Total current assets	3,054,691	2,764,172
Property and equipment, net	421,017	402,448
Intangible assets, net	53,040	54,017
Goodwill	51,889	51,889
Long-term deferred contract costs	602,205	567,974
Other assets	58,780	62,013
Total assets	4,241,622	3,902,513
Current liabilities:
Accounts payable	10,036	16,054
Income tax payable	19,350
Accrued commissions and bonuses	17,594	28,439
Accrued payroll and vacation	36,188	45,023
Deferred revenue	20,505	19,825
Accrued expenses and other current liabilities	70,090	59,990
Current liabilities before client funds obligation	173,763	169,331
Client funds obligation	2,391,335	2,207,706
Total current liabilities	2,565,098	2,377,037
Deferred income tax liabilities, net	139,661	141,033
Long-term deferred revenue	100,297	97,591
Long-term debt	29,000	29,000
Other long-term liabilities	73,095	75,245
Total long-term liabilities	342,053	342,869
Total liabilities	2,907,151	2,719,906
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.01 par value (100,000 shares authorized, 62,525 and 62,518 shares issued at March 31, 2023 and December 31, 2022, respectively; 57,872 and 57,867 shares outstanding at March 31, 2023 and December 31, 2022, respectively)	625	625
Additional paid-in capital	608,966	576,622
Retained earnings	1,316,264	1,196,968
Accumulated other comprehensive earnings (loss)	(2,853)	(3,703)
Treasury stock, at cost (4,655 and 4,651 shares at March 31, 2023 and December 31, 2022, respectively)	(588,531)	(587,905)
Total stockholders’ equity	1,334,471	1,182,607
Total liabilities and stockholders’ equity	$ 4,241,622	$ 3,902,513