Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 47,869	$ 93,557
Marketable securities	32,033	19,787
Trade accounts receivable, net	104,008	85,586
Prepaid expenses and other	5,283	3,026
Deferred income taxes	8,944	8,929
Total current assets	198,137	210,885
Marketable securities	10,597	5,909
Property, equipment and software, net	21,786	20,549
Restricted certificates of deposit	20,943	12,789
Restricted marketable securities and workers' compensation deposits	34,696	11,205
Other assets	3,979	4,165
Goodwill	47,820	47,820
Total assets	337,958	313,322
Current liabilities:
Current portion of long-term debt	220	220
Accounts payable	2,435	3,252
Accrued payroll, payroll taxes and related benefits	105,710	92,516
Income taxes payable	2,322	1,236
Other accrued liabilities	1,081	313
Workers' compensation claims liabilities	39,069	35,841
Safety incentives liability	12,718	13,086
Total current liabilities	163,555	146,464
Long-term workers' compensation claims liabilities	83,437	76,603
Long-term debt	4,943	5,053
Deferred income taxes	10,392	10,787
Customer deposits and other long-term liabilities	1,967	1,862
Commitments and contingencies
Stockholders' equity:
Common stock, $.01 par value; 20,500 shares authorized, 7,162 and 7,165 shares issued and outstanding	72	72
Additional paid-in capital	5,798	5,781
Accumulated other comprehensive loss	(50)	(26)
Retained earnings	67,844	66,726
Total stockholders' equity	73,664	72,553
Total liabilities and stockholders' equity	$ 337,958	$ 313,322