CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 44,293	$ 8,700
Accounts receivable, net	467,978	437,132
Inventories	135,727	126,604
Deferred income taxes	12,502	14,185
Income taxes receivable	2,099	5,720
Prepaid expenses	8,538	9,143
Other current assets	1,691	3,441
Total current assets	672,828	604,925
Property, plant and equipment, net	707,774	726,307
Goodwill	32,150	31,861
Other assets	21,543	20,767
Total assets	1,434,295	1,383,860
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	141,398	119,170
Accrued payroll and related expenses	30,439	36,638
Accrued insurance expenses	6,374	6,072
Accrued state, local and other taxes	6,505	5,002
Income taxes payable	6,593
Other accrued expenses	1,230	1,170
Total current liabilities	192,539	168,052
Long-term accrued insurance expenses	11,183	10,225
Notes payable to banks	80,800	53,300
Long-term pension liabilities	22,229	21,966
Deferred income taxes	141,330	153,176
Other long-term liabilities	7,902	8,439
Total liabilities	455,983	415,158
Common stock	21,884	21,899
Capital in excess of par value
Retained earnings	966,966	956,918
Accumulated other comprehensive loss	(10,538)	(10,115)
Total stockholders' equity	978,312	968,702
Total liabilities and stockholders' equity	$ 1,434,295	$ 1,383,860