CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 7,190	$ 9,035
Accounts receivable, net	400,348	294,002
Inventories	78,657	64,059
Deferred income taxes	7,684	7,426
Income taxes receivable	604	17,251
Prepaid expenses and other current assets	15,646	6,905
Total current assets	510,129	398,678
Property, plant and equipment, net	568,112	453,017
Goodwill	24,093	24,093
Other assets	12,458	12,083
Total assets	1,114,792	887,871
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	119,324	78,743
Accrued payroll and related expenses	25,079	23,881
Accrued insurance expenses	6,018	5,141
Accrued state, local and other taxes	5,636	2,988
Income taxes payable	19,081	5,788
Other accrued expenses	472	963
Total current liabilities	175,610	117,504
Long-term accrued insurance expenses	9,189	8,489
Notes payable to banks	173,100	121,250
Long-term pension liabilities	18,935	18,397
Other long-term liabilities	2,318	2,448
Deferred income taxes	89,376	80,888
Total liabilities	468,528	348,976
Common stock	14,829	14,818
Capital in excess of par value		6,460
Retained earnings	640,562	527,150
Accumulated other comprehensive loss	(9,127)	(9,533)
Total stockholders' equity	646,264	538,895
Total liabilities and stockholders' equity	$ 1,114,792	$ 887,871