CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 65,196	$ 9,772
Accounts receivable, net	232,187	634,730
Inventories	128,441	155,611
Deferred income taxes		9,422
Income taxes receivable	51,392	29,115
Prepaid expenses	8,961	9,135
Other current assets	6,031	3,843
Current assets	492,208	851,628
Property, plant and equipment, net	688,335	849,383
Goodwill	32,150	32,150
Other assets	24,401	26,197
Total assets	1,237,094	1,759,358
LIABILITIES
Accounts payable	75,811	175,416
Accrued payroll and related expenses	16,654	49,798
Accrued insurance expenses	4,296	5,632
Accrued state, local and other taxes	2,838	6,821
Income taxes payable	7,639	944
Other accrued expenses	226	401
Current liabilities	107,464	239,012
Long-term accrued insurance expenses	11,348	10,099
Notes payable to banks		224,500
Long-term pension liabilities	33,009	34,399
Deferred income taxes	115,495	156,977
Other long-term liabilities	17,497	15,989
Total liabilities	$ 284,813	$ 680,976
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, 216,991,357 and 216,539,015 shares issued and outstanding in 2015 and 2014, respectively	$ 21,699	$ 21,654
Capital in excess of par value
Retained earnings	$ 948,551	$ 1,074,561
Accumulated other comprehensive loss	(17,969)	(17,833)
Total stockholders' equity	952,281	1,078,382
Total liabilities and stockholders' equity	$ 1,237,094	$ 1,759,358