Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 69,405	$ 68,688
Investments	96,763	101,244
Trade accounts receivable, net	155,707	118,506
Income taxes receivable		6,485
Prepaid expenses and other	17,606	15,961
Restricted cash and investments	67,238	96,991
Total current assets	406,719	407,875
Property, equipment and software, net	36,277	34,916
Operating lease right-of-use assets	20,697	23,025
Restricted cash and investments	232,965	258,153
Goodwill	47,820	47,820
Other assets	2,474	3,161
Total assets	746,952	774,950
Current liabilities:
Current portion of long-term debt	3,510	221
Accounts payable	4,485	4,746
Accrued payroll, payroll taxes and related benefits	199,067	149,989
Income taxes payable	1,673
Current operating lease liabilities	7,191	7,539
Other accrued liabilities	15,120	7,275
Workers' compensation claims liabilities	80,028	102,040
Safety incentives liability	4,322	18,827
Total current liabilities	315,396	290,637
Long-term workers' compensation claims liabilities	199,379	255,706
Long-term debt		3,510
Deferred income taxes	1,687	4,518
Long-term operating lease liabilities	14,598	16,419
Customer deposits and other long-term liabilities	7,362	5,925
Total liabilities	538,422	576,715
Commitments and contingencies (Notes 6, 8 and 12)
Stockholders' equity:
Common stock, $.01 par value; 20,500 shares authorized, 7,415 and 7,566 shares issued and outstanding in 2021 and 2020, respectively	74	76
Additional paid-in capital	29,054	24,885
Accumulated other comprehensive income	1,079	7,564
Retained earnings	178,323	165,710
Total stockholders' equity	208,530	198,235
Total liabilities and stockholders' equity	$ 746,952	$ 774,950