CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 8,522	$ 8,700
Accounts receivable, net	591,585	437,132
Inventories	153,948	126,604
Deferred income taxes	10,851	14,185
Income taxes receivable	11,081	5,720
Prepaid expenses	5,507	9,143
Other current assets	3,562	3,441
Total current assets	785,056	604,925
Property, plant and equipment, less accumulated depreciation of $1,199,595 in 2014 and $1,069,321 in 2013	775,714	726,307
Goodwill	32,150	31,861
Other assets	23,113	20,767
Total assets	1,616,033	1,383,860
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	182,123	119,170
Accrued payroll and related expenses	41,446	36,638
Accrued insurance expenses	5,526	6,072
Accrued state, local and other taxes	10,609	5,002
Income taxes payable	558
Other accrued expenses	1,214	1,170
Total current liabilities	241,476	168,052
Long-term accrued insurance expenses	10,082	10,225
Notes payable to banks	152,000	53,300
Long-term pension liabilities	22,786	21,966
Deferred income taxes	114,459	153,176
Other long-term liabilities	14,285	8,439
Total liabilities	555,088	415,158
Common stock	21,860	21,899
Capital in excess of par value
Retained earnings	1,049,636	956,918
Accumulated other comprehensive loss	(10,551)	(10,115)
Total stockholders' equity	1,060,945	968,702
Total liabilities and stockholders' equity	$ 1,616,033	$ 1,383,860