Consolidated Balance Sheets - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 109,920,000	$ 27,329,000
Marketable securities, at fair value	94,042,000	90,711,000
Accounts and notes receivable, less allowance for doubtful accounts of $76,751 and $45,726 as of September 30, 2020 and December 31, 2019, respectively	277,031,000	340,930,000
Inventories and supplies	32,692,000	36,517,000
Prepaid expenses and other assets	23,834,000	20,245,000
Total current assets	537,519,000	515,732,000
Property and equipment, net	27,807,000	28,820,000
Goodwill	51,084,000	51,084,000
Other intangible assets, less accumulated amortization of $22,424 and $19,300 as of September 30, 2020 and December 31, 2019, respectively	19,229,000	22,353,000
Notes receivable — long–term portion, less allowance for doubtful accounts of $5,342 and $6,667 as of September 30, 2020 and December 31, 2019, respectively	39,458,000	46,992,000
Deferred compensation funding, at fair value	40,969,000	37,247,000
Deferred income taxes	38,265,000	20,364,000
Total assets	754,331,000	722,592,000
Current liabilities:
Accounts payable	53,940,000	54,418,000
Accrued payroll and related taxes	16,443,000	36,413,000
Other accrued expenses	12,642,000	16,489,000
Borrowings under line of credit	0	10,000,000
Income taxes payable	25,495,000	8,075,000
Accrued insurance claims	25,776,000	23,256,000
Total current liabilities	134,296,000	148,651,000
Accrued insurance claims — long-term portion	70,296,000	64,366,000
Deferred compensation liability	41,045,000	37,621,000
Accrued payroll and related taxes - noncurrent	32,304,000	0
Lease liability — long-term portion	11,640,000	11,649,000
Commitments and contingencies (Note 15)
STOCKHOLDERS’ EQUITY:
Common stock, $0.01 par value; 100,000 shares authorized; 75,734 and 75,557 shares issued, and 74,423 and 74,149 shares outstanding as of September 30, 2020 and December 31, 2019, respectively	757,000	756,000
Additional paid-in capital	279,408,000	270,614,000
Retained earnings	188,578,000	195,455,000
Accumulated other comprehensive income, net of taxes	4,915,000	2,919,000
Common stock in treasury, at cost, 1,311 and 1,408 shares as of September 30, 2020 and December 31, 2019, respectively	(8,908,000)	(9,439,000)
Total stockholders’ equity	464,750,000	460,305,000
Total liabilities and stockholders’ equity	$ 754,331,000	$ 722,592,000