Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 40,572	$ 26,025
Marketable securities, at fair value	79,714	76,362
Accounts and notes receivable, less allowance for doubtful accounts of $44,192 and $47,209 as of September 30, 2019 and December 31, 2018, respectively	349,654	341,838
Inventories and supplies	38,888	41,443
Prepaid expenses and other assets	23,084	22,468
Total current assets	531,912	508,136
Property and equipment, net	28,975	12,900
Goodwill	51,084	51,084
Other intangible assets, less accumulated amortization of $19,299 and $17,216 as of September 30, 2019 and December 31, 2018, respectively	23,394	26,518
Notes receivable – long–term portion, less allowance for doubtful accounts of $10,000 as of September 30, 2019 and December 31, 2018	36,883	43,043
Deferred compensation funding, at fair value	34,385	29,113
Deferred income taxes	19,726	20,552
Other noncurrent assets	0	1,257
Total assets	726,359	692,603
Current liabilities:
Accounts payable	59,355	61,467
Accrued payroll, accrued and withheld payroll taxes	54,093	35,198
Other accrued expenses	10,413	8,890
Borrowings under line of credit	10,000	30,000
Income taxes payable	3,066	7,140
Accrued insurance claims	23,082	20,696
Total current liabilities	160,009	163,391
Accrued insurance claims — long-term portion	64,696	58,904
Deferred compensation liability	34,717	29,528
Lease liability — long-term portion	11,638	0
Commitments and contingencies (Note 15)
STOCKHOLDERS’ EQUITY:
Common stock, $.01 par value; 100,000 shares authorized; 75,519 and 75,344 shares issued, and 74,112 and 73,877 shares outstanding as of September 30, 2019 and December 31, 2018, respectively	755	753
Additional paid-in capital	269,598	259,440
Retained earnings	191,515	190,092
Accumulated other comprehensive income, net of taxes	2,822	158
Common stock in treasury, at cost, 1,407 and 1,467 shares as of September 30, 2019 and December 31, 2018, respectively	(9,391)	(9,663)
Total stockholders’ equity	455,299	440,780
Total liabilities and stockholders’ equity	$ 726,359	$ 692,603