CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 14,163	$ 7,393
Accounts receivable, net	387,530	461,272
Inventories	140,867	100,438
Deferred income taxes	5,777	7,183
Income taxes receivable	4,234	10,805
Prepaid expenses	10,762	8,478
Other current assets	4,494	30,986
Current assets	567,827	626,555
Property, plant and equipment, net	756,326	675,360
Goodwill	24,093	24,093
Other assets	18,917	12,203
Total assets	1,367,163	1,338,211
LIABILITIES
Accounts payable	109,846	122,987
Accrued payroll and related expenses	32,053	33,680
Accrued insurance expenses	6,152	5,744
Accrued state, local and other taxes	7,326	5,066
Income taxes payable	6,428	10,705
Other accrued expenses	2,706	1,284
Current liabilities	164,511	179,466
Long-term accrued insurance expenses	10,400	9,000
Notes payable to banks	107,000	203,300
Long-term pension liabilities	26,543	24,445
Deferred income taxes	155,007	155,928
Other long-term liabilities	4,470	3,480
Total liabilities	467,931	575,619
Commitments and contingencies
STOCKHOLDERS' EQUITY
Preferred stock, $0.10 par value, 1,000,000 shares authorized, none issued
Common stock, $0.10 par value, 349,000,000 shares authorized, 220,144,287 and 221,187,660 shares issued and outstanding in 2012 and 2011, respectively	22,014	22,119
Capital in excess of par value
Retained earnings	891,464	753,119
Accumulated other comprehensive loss	(14,246)	(12,646)
Total stockholders' equity	899,232	762,592
Total liabilities and stockholders' equity	$ 1,367,163	$ 1,338,211