CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
Assets
Cash and cash equivalents	$ 392,657		$ 141,273		$ 268,773
Restricted cash	0		0		63,024
Accounts and notes receivable
Accounts and notes receivable, gross	375,196		378,947		353,601
Less: Allowance for doubtful accounts	(5,244)		(5,105)		(5,264)
Accounts and notes receivable, net	369,952		373,842		348,337
Inventories
Finished products	285,313		275,172		258,007
Raw materials	21,203		19,741		19,431
Products in process	1,189		1,250		875
Operating supplies and other	25,987		25,641		27,520
Inventories	333,692		321,804		305,833
Current deferred income taxes	39,881		39,726		39,591
Prepaid expenses	58,483		28,640		28,184
Assets held for sale	0		15,184		0
Total current assets	1,194,665		920,469		1,053,742
Investments and long-term receivables	41,613		41,650		42,137
Property, plant & equipment
Property, plant & equipment, cost	6,671,537		6,608,842		6,340,034
Reserve for depreciation, depletion & amortization	(3,587,444)		(3,537,212)		(3,446,744)
Property, plant & equipment, net	3,084,093		3,071,630		2,893,290
Goodwill	3,094,824		3,094,824		3,081,521
Other intangible assets, net	764,072		758,243		633,870
Other noncurrent assets	171,348		175,086		167,675
Total assets	8,350,615		8,061,902		7,872,235
Liabilities
Current maturities of long-term debt	365,441	[1]	150,137	[1]	171	[1]
Trade payables and accruals	157,829		145,148		150,628
Other current liabilities	180,066		156,073		190,069
Liabilities of assets held for sale	0		520		0
Total current liabilities	703,336		451,878		340,868
Long-term debt	1,912,455		1,855,447		2,006,782
Noncurrent deferred income taxes	682,849		691,137		693,234
Deferred revenue	212,987		213,968		218,946
Other noncurrent liabilities	678,821		672,773		581,286
Total liabilities	4,190,448		3,885,203		3,841,116
Other commitments and contingencies (Note 8)
Equity
Common stock, $1 par value, Authorized 480,000 shares, Issued 132,660, 131,907 and 130,802 shares, respectively	132,660		131,907		130,802
Capital in excess of par value	2,765,391		2,734,661		2,651,949
Retained earnings	1,418,901		1,471,845		1,343,294
Accumulated other comprehensive loss	(156,785)		(161,714)		(94,926)
Total equity	4,160,167		4,176,699		4,031,119
Total liabilities and equity	$ 8,350,615		$ 8,061,902		$ 7,872,235

[1] The 10.125% notes due 2015 are classified as long-term debt (not current maturities) as of March 31, 2015 due to our intent and ability to refinance these notes at maturity using our line of credit.