Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 23,853	$ 33,189
Marketable securities, at fair value	67,730	69,496
Accounts and notes receivable, less allowance for doubtful accounts of $6,911 as of December 31, 2016 and $4,608 as of December 31, 2015	271,276	214,854
Inventories and supplies	37,800	36,308
Prepaid expenses and other assets	13,965	11,495
Total current assets	414,624	365,342
Property and equipment, net	13,455	13,086
Goodwill	44,438	44,438
Other intangible assets, less accumulated amortization of $14,672 as of December 31, 2016 and $19,473 as of December 31, 2015	14,409	17,108
Notes receivable — long term portion, net of reserve	7,531	2,972
Deferred compensation funding, at fair value	24,119	25,391
Deferred income taxes	9,822	12,567
Other noncurrent assets	48	45
Total Assets	528,446	480,949
Current liabilities:
Accounts payable	42,912	41,472
Accrued payroll, accrued and withheld payroll taxes	22,303	18,062
Other accrued expenses	3,075	3,115
Income taxes payable	7,686	3,212
Accrued legal expenses	1,322	10,464
Accrued insurance claims	23,573	19,740
Total current liabilities	100,871	96,065
Accrued insurance claims — long term portion	64,080	62,510
Deferred compensation liability	24,653	25,918
Commitments and contingencies
STOCKHOLDERS’ EQUITY:
Common stock, $.01 par value; 100,000 shares authorized; 74,204 and 73,793 shares issued, and 72,601 and 72,034 shares outstanding as of December 31, 2016 and December 31, 2015, respectively	742	738
Additional paid-in capital	217,664	199,294
Retained earnings	130,940	106,886
Accumulated other comprehensive (loss) income, net of taxes	(319)	543
Common stock in treasury, at cost, 1,603 shares as of December 31, 2016 and 1,759 shares as of December 31, 2015	(10,185)	(11,005)
Total stockholders’ equity	338,842	296,456
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 528,446	$ 480,949