CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 367,342	$ 326,773
Restricted cash	49,295	42,227
Marketable securities	34,728	60,781
Accounts receivable, net	465,779	400,623
Prepaid insurance	10,418	8,411
Other current assets	43,493	27,721
Income taxes receivable	3,691	0
Total current assets	974,746	866,536
Property and equipment, net	147,706	117,213
Right-of-use leased assets	56,886	0
Deposits and prepaid health insurance	193,013	181,674
Goodwill and other intangible assets, net	12,714	12,726
Deferred income taxes, net	3,956	8,816
Other assets	5,975	4,851
Total assets	1,394,996	1,191,816
Liabilities and stockholders’ equity
Accounts payable	4,565	10,622
Payroll taxes and other payroll deductions payable	277,248	261,166
Accrued worksite employee payroll cost	401,859	329,979
Accrued health insurance costs	21,180	35,153
Accrued workers’ compensation costs	52,868	45,818
Accrued corporate payroll and commissions	52,612	60,704
Other accrued liabilities	58,713	28,890
Total current liabilities	869,045	772,332
Accrued workers’ compensation costs	193,609	187,412
Long-term debt	269,400	144,400
Operating lease liabilities, net of current	58,863	0
Other accrued liabilities, net of current	0	9,996
Total noncurrent liabilities	521,872	341,808
Commitments and contingencies
Stockholders’ equity:
Preferred stock, par value $0.01 per share: Shares authorized - 20,000; Shares issued and outstanding - none	0	0
Common stock, par value $0.01 per share: Shares authorized - 120,000; Shares issued - 55,489 at December 31, 2019 and 2018	555	555
Additional paid-in capital	48,141	36,752
Treasury stock, at cost (16,117 and 14,555 shares held in treasury)	(544,102)	(357,569)
Accumulated other comprehensive income, net of tax	12	(9)
Retained earnings	499,473	397,947
Total stockholders’ equity	4,079	77,676
Total liabilities and stockholders’ equity	$ 1,394,996	$ 1,191,816