Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 422	$ 25,218
Trade accounts receivable, net	177,927	90,529
Income taxes receivable	0	1,038
Prepaid expenses and other	4,818	3,173
Restricted certificates of deposit	0	10,000
Restricted marketable securities and workers' compensation deposits	48,371	76,110
Deferred income taxes	20,908	20,941
Total current assets	252,446	227,009
Marketable securities	2,362	6,082
Property, equipment and software, net	23,958	22,820
Restricted certificates of deposit	10,000	0
Restricted marketable securities and workers' compensation deposits	235,584	187,916
Other assets	4,551	5,130
Goodwill	47,820	47,820
Total assets	576,721	496,777
Current liabilities:
Current portion of long-term debt	7,721	19,833
Accounts payable	4,458	3,217
Accrued payroll, payroll taxes and related benefits	186,295	121,343
Income taxes payable	71	0
Other accrued liabilities	4,419	6,166
Workers' compensation claims liabilities	71,785	65,581
Safety incentives liability	24,262	21,253
Total current liabilities	299,011	237,393
Long-term workers' compensation claims liabilities	205,265	190,094
Long-term debt	4,502	0
Deferred income taxes	13,256	13,256
Customer deposits and other long-term liabilities	1,399	1,483
Total liabilities	523,433	442,226
Commitments and contingencies (Notes 5 and 7)
Stockholders' equity:
Common stock, $.01 par value; 20,500 shares authorized, 7,210 and 7,203 shares issued and outstanding	72	72
Additional paid-in capital	8,301	6,964
Accumulated other comprehensive income (loss)	23	(31)
Retained earnings	44,892	47,546
Total stockholders' equity	53,288	54,551
Total liabilities and stockholders' equity	$ 576,721	$ 496,777