Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 14,272	$ 44,570
Investments	79,373	82,590
Trade accounts receivable, net	165,790	163,561
Income taxes receivable	2,437	1,335
Prepaid expenses and other	16,511	14,919
Restricted cash and investments	120,054	116,873
Total current assets	398,437	423,848
Property, equipment and software, net	34,163	31,724
Operating lease right-of-use assets	25,730	23,805
Restricted cash and investments	346,623	327,326
Goodwill	47,820	47,820
Other assets	3,489	3,618
Deferred income taxes	3,325	2,788
Total assets	859,587	860,929
Current liabilities:
Current portion of long-term debt	221	221
Accounts payable	4,333	5,993
Accrued payroll, payroll taxes and related benefits	180,526	174,168
Current operating lease liabilities	7,046	6,671
Other accrued liabilities	7,043	8,846
Workers' compensation claims liabilities	117,894	118,273
Safety incentives liability	26,330	27,950
Total current liabilities	343,393	342,122
Long-term workers' compensation claims liabilities	327,416	320,713
Long-term debt	3,675	3,730
Long-term operating lease liabilities	19,485	17,883
Customer deposits and other long-term liabilities	4,342	4,682
Total liabilities	698,311	689,130
Commitments and contingencies (Notes 4 and 6)
Stockholders' equity:
Common stock, $.01 par value; 20,500 shares authorized, 7,505 and 7,514 shares issued and outstanding	75	75
Additional paid-in capital	20,925	20,227
Accumulated other comprehensive income	84	2,819
Retained earnings	140,192	148,678
Total stockholders' equity	161,276	171,799
Total liabilities and stockholders' equity	$ 859,587	$ 860,929