CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 8,700	$ 14,163
Accounts receivable, net	437,132	387,530
Inventories	126,604	140,867
Deferred income taxes	14,185	5,777
Income taxes receivable	5,720	4,234
Prepaid expenses	9,143	10,762
Other current assets	3,441	4,494
Current assets	604,925	567,827
Property, plant and equipment, net	726,307	756,326
Goodwill	31,861	24,093
Other assets	20,767	18,917
Total assets	1,383,860	1,367,163
LIABILITIES
Accounts payable	119,170	109,846
Accrued payroll and related expenses	36,638	32,053
Accrued insurance expenses	6,072	6,152
Accrued state, local and other taxes	5,002	7,326
Income taxes payable		6,428
Other accrued expenses	1,170	2,706
Current liabilities	168,052	164,511
Long-term accrued insurance expenses	10,225	10,400
Notes payable to banks	53,300	107,000
Long-term pension liabilities	21,966	26,543
Deferred income taxes	153,176	155,007
Other long-term liabilities	8,439	4,470
Total liabilities	415,158	467,931
Commitments and contingencies (Note 9)
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, 218,985,816 and 220,144,287 shares issued and outstanding in 2013 and 2012, respectively	21,899	22,014
Capital in excess of par value
Retained earnings	956,918	891,464
Accumulated other comprehensive loss	(10,115)	(14,246)
Total stockholders' equity	968,702	899,232
Total liabilities and stockholders' equity	$ 1,383,860	$ 1,367,163