Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 4,540	$ 4,367
Accounts receivable, net	139,041	128,367
Prepaid expenses and other	42,156	56,902
Total current assets	185,737	189,636
Property and Equipment, at cost	975,874	891,145
Less-accumulated depreciation	443,330	407,505
Net property and equipment	532,544	483,640
Goodwill and Identifiable Intangibles, net	27,381	8,174
Other Noncurrent Assets	5,325	4,995
Total assets	750,987	686,445
Current Liabilities:
Accounts payable	59,504	42,388
Wages, vacation and employees’ benefits	32,463	28,777
Other current liabilities	50,495	50,176
Current portion of long-term debt	12,031	9,138
Total current liabilities	154,493	130,479
Other Liabilities:
Long-term debt, less current portion	69,163	73,897
Deferred income taxes	77,775	78,406
Claims, insurance and other	35,728	36,757
Total other liabilities	$ 182,666	$ 189,060
Commitments and Contingencies
Stockholders’ Equity:
Preferred stock, $0.001 par value, 50,000 shares authorized, none issued and outstanding
Common stock, $0.001 par value, 50,000,000 shares authorized, 25,136,476 and 24,871,806 shares issued and outstanding at September 30, 2015 and December 31, 2014, respectively	$ 25	$ 25
Additional paid-in-capital	228,015	223,713
Deferred compensation trust, 172,266 and 193,607 shares of common stock at cost at September 30, 2015 and December 31, 2014, respectively	(3,198)	(2,189)
Retained earnings	188,986	145,357
Total stockholders’ equity	413,828	366,906
Total liabilities and stockholders’ equity	$ 750,987	$ 686,445