Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 31,681	$ 70,794
Marketable securities, at fair value	97,488	114,396
Accounts and notes receivable, less allowance for doubtful accounts of $70,798 and $59,271 as of June 30, 2022 and December 31, 2021, respectively	331,534	293,388
Inventories and supplies	23,535	26,015
Taxes receivable	3,775	8,813
Prepaid expenses and other assets	33,839	32,976
Total current assets	521,852	546,382
Property and equipment, net	25,632	28,102
Goodwill	75,529	74,755
Other intangible assets, less accumulated amortization of $30,313 and $27,879 as of June 30, 2022 and December 31, 2021, respectively	18,371	20,805
Notes receivable — long–term portion, less allowance for doubtful accounts of $5,222 and $6,312 as of June 30, 2022 and December 31, 2021, respectively	32,901	29,259
Deferred compensation funding, at fair value	32,320	46,691
Deferred tax asset	33,453	31,535
Total assets	740,058	777,529
Current liabilities:
Accounts payable	66,466	64,419
Accrued payroll and related taxes	61,572	68,664
Other accrued expenses	14,819	26,741
Borrowings under line of credit	10,000	0
Deferred compensation liability — short-term	4,694	6,991
Accrued insurance claims	26,378	24,310
Total current liabilities	183,929	191,125
Accrued insurance claims — long-term	69,233	65,084
Deferred compensation liability — long-term	32,789	46,888
Lease liability — long-term	9,856	11,299
Other long-term liabilities	6,406	10,456
Commitments and contingencies (Note 14)
STOCKHOLDERS’ EQUITY:
Common stock, $0.01 par value; 100,000 shares authorized; 76,160 and 76,009 shares issued, and 74,054 and 73,769 shares outstanding as of June 30, 2022 and December 31, 2021, respectively	762	760
Additional paid-in capital	298,405	294,124
Retained earnings	170,267	183,957
Accumulated other comprehensive (loss) income, net of taxes	(3,214)	4,000
Common stock in treasury, at cost, 2,106 and 2,240 shares as of June 30, 2022 and December 31, 2021, respectively	(28,375)	(30,164)
Total stockholders’ equity	437,845	452,677
Total liabilities and stockholders’ equity	$ 740,058	$ 777,529