CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 164,150	$ 207,749
Accounts receivable trade, net	399,207	379,987
Accounts receivable other	3,917	10,344
Prepaid taxes	3,339	362
Deferred taxes		8,412
Prepaid expenses and other current assets	15,071	17,756
TOTAL CURRENT ASSETS	585,684	624,610
Restricted investments	19,991	21,108
Property and equipment, net	381,532	374,847
Other intangibles, net	12,491	13,139
Goodwill, net	262,485	262,594
Other assets	4,287	4,848
TOTAL ASSETS	1,266,470	1,301,146
CURRENT LIABILITIES:
Accounts payable trade	251,815	230,432
Accounts payable other	24,841	21,495
Accrued payroll	22,883	33,020
Accrued other	38,005	38,733
Current portion of capital lease	2,648	2,608
Current portion of long term debt	35,430	32,409
TOTAL CURRENT LIABILITIES	375,622	358,697
Long term debt	94,968	100,895
Non-current liabilities	21,536	20,233
Long term portion of capital lease	11,962	13,299
Deferred taxes	159,319	160,182
STOCKHOLDERS' EQUITY:
Preferred stock, $.01 par value; 2,000,000 shares authorized; no shares issued or outstanding in 2016 and 2015
Additional paid-in capital	169,229	174,285
Purchase price in excess of predecessor basis, net of tax benefit of $10,306	(15,458)	(15,458)
Retained earnings	699,395	660,758
Accumulated other comprehensive loss	(231)	(178)
Treasury stock; at cost, 7,656,930 shares in 2016 and 5,590,831 shares in 2015	(250,291)	(171,986)
TOTAL STOCKHOLDERS' EQUITY	603,063	647,840
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,266,470	1,301,146
Class A Common Stock [Member]
STOCKHOLDERS' EQUITY:
Common stock	412	412
Class B Common Stock [Member]
STOCKHOLDERS' EQUITY:
Common stock	$ 7	$ 7