CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 11,142	$ 7,393
Accounts receivable, net	378,156	461,272
Inventories	142,558	100,438
Deferred income taxes	6,357	7,183
Income taxes receivable	3,103	10,805
Prepaid expenses	5,125	8,478
Other current assets	11,063	30,986
Total current assets	557,504	626,555
Property, plant and equipment, net	760,114	675,360
Goodwill	24,093	24,093
Other assets	16,435	12,203
Total assets	1,358,146	1,338,211
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	114,094	122,987
Accrued payroll and related expenses	33,444	33,680
Accrued insurance expenses	6,353	5,744
Accrued state, local and other taxes	11,315	5,066
Income taxes payable	1,553	10,705
Other accrued expenses	202	1,284
Total current liabilities	166,961	179,466
Long-term accrued insurance expenses	10,791	9,000
Notes payable to banks	83,700	203,300
Long-term pension liabilities	22,573	24,445
Other long-term liabilities	3,545	3,480
Deferred income taxes	162,623	155,928
Total liabilities	450,193	575,619
Common stock	21,972	22,119
Retained earnings	898,232	753,119
Accumulated other comprehensive loss	(12,251)	(12,646)
Total stockholders' equity	907,953	762,592
Total liabilities and stockholders' equity	$ 1,358,146	$ 1,338,211