Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 181,827	$ 133,667
Accounts receivable	8,059	9,298
Prepaid expenses	17,853	13,561
Inventory	930	1,158
Income tax receivable		4,020
Deferred contract costs	50,513	46,618
Current assets before funds held for clients	259,182	208,322
Funds held for clients	1,392,379	1,662,778
Total current assets	1,651,561	1,871,100
Property and equipment, net	254,423	238,458
Goodwill	51,889	51,889
Long-term deferred contract costs	316,768	292,134
Other assets	35,084	33,336
Total assets	2,309,725	2,486,917
Current liabilities:
Accounts payable	5,694	5,051
Income tax payable	15,953
Accrued commissions and bonuses	5,662	12,343
Accrued payroll and vacation	21,159	14,870
Deferred revenue	11,660	11,105
Current portion of long-term debt	1,775	1,775
Accrued expenses and other current liabilities	43,633	45,600
Current liabilities before client funds obligation	105,536	90,744
Client funds obligation	1,392,379	1,662,778
Total current liabilities	1,497,915	1,753,522
Deferred income tax liabilities, net	92,609	91,217
Long-term deferred revenue	66,795	65,139
Net long-term debt, less current portion	30,423	30,858
Other long-term liabilities	22,195	19,553
Total long-term liabilities	212,022	206,767
Total liabilities	1,709,937	1,960,289
Commitments and contingencies
Stockholders' equity:
Common stock, $0.01 par value (100,000 shares authorized, 61,352 and 61,350 shares issued at March 31, 2020 and December 31, 2019, respectively; 57,622 and 57,660 shares outstanding at March 31, 2020 and December 31, 2019, respectively)	614	613
Additional paid-in capital	275,813	257,501
Retained earnings	639,181	576,166
Treasury stock, at cost (3,730 and 3,689 shares at March 31, 2020 and December 31, 2019, respectively)	(315,820)	(307,652)
Total stockholders' equity	599,788	526,628
Total liabilities and stockholders' equity	$ 2,309,725	$ 2,486,917