Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 28,662	$ 26,279
Marketable securities, at fair value	93,185	95,200
Accounts and notes receivable, less allowance for doubtful accounts of $75,745 and $70,192 as of June 30, 2023 and December 31, 2022, respectively	380,061	336,777
Inventories and supplies	19,976	21,164
Taxes receivable	926	6,629
Prepaid expenses and other assets	26,276	22,583
Total current assets	549,086	508,632
Property and equipment, net	26,932	22,975
Goodwill	75,529	75,529
Other intangible assets, less accumulated amortization of $35,145 and $32,738 as of June 30, 2023 and December 31, 2022, respectively	13,539	15,946
Notes receivable — long–term portion, less allowance for doubtful accounts of $3,917 and $3,273 as of June 30, 2023 and December 31, 2022, respectively	30,740	32,609
Deferred compensation funding, at fair value	37,020	33,493
Deferred tax asset	28,204	28,338
Other long-term assets	708	812
Total assets	761,758	718,334
Current liabilities:
Accounts payable	65,622	68,296
Accrued payroll and related taxes	39,223	42,704
Other accrued expenses and current liabilities	17,129	17,835
Borrowings under line of credit	40,000	25,000
Income taxes payable	1,364	0
Deferred compensation liability — short-term	1,435	1,618
Accrued insurance claims	24,891	23,166
Total current liabilities	189,664	178,619
Accrued insurance claims — long-term	68,920	65,541
Deferred compensation liability — long-term	37,171	33,764
Lease liability — long-term	11,560	8,097
Other long-term liabilities	3,854	6,141
Commitments and contingencies (Note 15)
STOCKHOLDERS’ EQUITY:
Common stock, $0.01 par value; 100,000 shares authorized; 76,329 and 76,161 shares issued, and 74,195 and 74,088 shares outstanding as of June 30, 2023 and December 31, 2022, respectively	763	762
Additional paid-in capital	305,853	302,304
Retained earnings	175,794	154,495
Accumulated other comprehensive loss, net of taxes	(3,130)	(3,477)
Common stock in treasury, at cost, 2,134 and 2,073 shares as of June 30, 2023 and December 31, 2022, respectively	(28,691)	(27,912)
Total stockholders’ equity	450,589	426,172
Total liabilities and stockholders’ equity	$ 761,758	$ 718,334