Unaudited Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 346,456	$ 294,025
Accounts receivable	20,034	16,442
Prepaid expenses	46,529	37,613
Inventory	1,415	1,383
Income tax receivable		18,391
Deferred contract costs	128,728	118,206
Current assets before funds held for clients	543,162	486,060
Funds held for clients	2,303,159	2,327,366
Total current assets	2,846,321	2,813,426
Property and equipment, net	531,884	498,197
Intangible assets, net	48,159	50,112
Goodwill	51,889	51,889
Long-term deferred contract costs	727,956	680,272
Other assets	106,535	103,643
Total assets	4,312,744	4,197,539
Current liabilities:
Accounts payable	14,997	13,875
Income tax payable	10,281
Accrued commissions and bonuses	22,227	30,492
Accrued payroll and vacation	60,533	56,086
Deferred revenue	31,432	22,812
Accrued expenses and other current liabilities	84,215	83,302
Current liabilities before client funds obligation	223,685	206,567
Client funds obligation	2,303,198	2,328,076
Total current liabilities	2,526,883	2,534,643
Deferred income tax liabilities, net	136,213	143,750
Long-term deferred revenue	110,928	107,657
Other long-term liabilities	112,189	108,453
Total long-term liabilities	359,330	359,860
Total liabilities	2,886,213	2,894,503
Commitments and contingencies (Note 12)
Stockholders' equity:
Common stock, $0.01 par value (100,000 shares authorized, 62,887 and 62,675 shares issued at June 30, 2024 and December 31, 2023, respectively; 56,151 and 56,528 shares outstanding at June 30, 2024 and December 31, 2023, respectively)	629	627
Additional paid-in capital	667,197	724,493
Retained earnings	1,743,608	1,469,981
Accumulated other comprehensive earnings (loss)	(305)	(1,039)
Treasury stock, at cost (6,736 and 6,147 shares at June 30, 2024 and December 31, 2023, respectively)	(984,598)	(891,026)
Total stockholders’ equity	1,426,531	1,303,036
Total liabilities and stockholders’ equity	$ 4,312,744	$ 4,197,539