Unaudited Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 156,398	$ 133,667
Accounts receivable	12,355	9,298
Prepaid expenses	20,757	13,561
Inventory	924	1,158
Income tax receivable	9,280	4,020
Deferred contract costs	56,245	46,618
Current assets before funds held for clients	255,959	208,322
Funds held for clients	1,522,357	1,662,778
Total current assets	1,778,316	1,871,100
Property and equipment, net	275,624	238,458
Goodwill	51,889	51,889
Long-term deferred contract costs	342,436	292,134
Other assets	36,934	33,336
Total assets	2,485,199	2,486,917
Current liabilities:
Accounts payable	9,237	5,051
Accrued commissions and bonuses	7,940	12,343
Accrued payroll and vacation	27,722	14,870
Deferred revenue	13,887	11,105
Current portion of long-term debt	1,775	1,775
Accrued expenses and other current liabilities	44,883	45,600
Current liabilities before client funds obligation	105,444	90,744
Client funds obligation	1,522,357	1,662,778
Total current liabilities	1,627,801	1,753,522
Deferred income tax liabilities, net	102,421	91,217
Long-term deferred revenue	71,500	65,139
Net long-term debt, less current portion	29,554	30,858
Other long-term liabilities	21,524	19,553
Total long-term liabilities	224,999	206,767
Total liabilities	1,852,800	1,960,289
Commitments and contingencies
Stockholders' equity:
Common stock, $0.01 par value (100,000 shares authorized, 61,639 and 61,350 shares issued at September 30, 2020 and December 31, 2019, respectively; 57,605 and 57,660 shares outstanding at September 30, 2020 and December 31, 2019, respectively)	616	613
Additional paid-in capital	322,321	257,501
Retained earnings	695,252	576,166
Treasury stock, at cost (4,034 and 3,689 shares at September 30, 2020 and December 31, 2019, respectively)	(385,790)	(307,652)
Total stockholders' equity	632,399	526,628
Total liabilities and stockholders' equity	$ 2,485,199	$ 2,486,917