Supplemental Consolidating Financial Information (Schedule Of Condensed Consolidating Statements Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) operating activities	$ 1,990	$ 186,592
Investing Activities
Payments on term loan	(14,625)	(12,375)
Capital expenditures	(118,701)	(223,168)
Minimum royalty payments	(3,604)	(10,901)
Proceeds from sale-leaseback transactions	0	34,919
Proceeds from disposals and divestitures	50,971	431,462
Purchases of marketable securities	(181,546)	(85,418)
Proceeds from sales of short term investments	178,293	67,255
Investments in and advances to affiliates	(13,393)	(11,124)
Change in restricted cash	0	3,453
Cash provided by (used in) investing activities	(87,980)	206,478
Financing Activities
Contributions from parent
Net payments on other debt	(10,187)	(13,084)
Debt financing costs	(2,219)
Dividends paid	(2,123)	(19,105)
Other	(21)	0
Transactions with affiliates, net
Cash used in financing activities	(29,175)	(44,564)
Increase (decrease) in cash and cash equivalents	(115,165)	348,506
Cash and cash equivalents, beginning of period	911,099	784,622
Cash and cash equivalents, end of period	795,934	1,133,128
Parent/Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) operating activities	(342,497)	(22,206)
Investing Activities
Payments on term loan	(14,625)	(12,375)
Capital expenditures	(1,195)	(2,488)
Minimum royalty payments		0
Proceeds from sale-leaseback transactions		0
Proceeds from disposals and divestitures	46,634	0
Purchases of marketable securities	(181,546)	(85,418)
Proceeds from sales of short term investments	178,293	67,255
Investments in and advances to affiliates	(2,047)	(4,016)
Change in restricted cash		3,453
Cash provided by (used in) investing activities	40,139	(21,214)
Financing Activities
Contributions from parent		0
Net payments on other debt	(6,814)	(12,700)
Debt financing costs	(2,219)
Dividends paid	(2,123)	(19,105)
Other	(15)
Transactions with affiliates, net	162,643	437,532
Cash used in financing activities	136,847	393,352
Increase (decrease) in cash and cash equivalents	(165,511)	349,932
Cash and cash equivalents, beginning of period	799,333	671,313
Cash and cash equivalents, end of period	633,822	1,021,245
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) operating activities	360,036	153,868
Investing Activities
Payments on term loan	0	0
Capital expenditures	(117,506)	(220,680)
Minimum royalty payments	(3,604)	(10,901)
Proceeds from sale-leaseback transactions		34,919
Proceeds from disposals and divestitures	4,337	431,462
Purchases of marketable securities		0
Proceeds from sales of short term investments		0
Investments in and advances to affiliates	(11,346)	(7,492)
Change in restricted cash		0
Cash provided by (used in) investing activities	(128,119)	227,308
Financing Activities
Contributions from parent		384
Net payments on other debt	(3,373)	(384)
Debt financing costs
Dividends paid		0
Other	0
Transactions with affiliates, net	(178,603)	(381,234)
Cash used in financing activities	(181,976)	(381,234)
Increase (decrease) in cash and cash equivalents	49,941	(58)
Cash and cash equivalents, beginning of period	100,418	100,468
Cash and cash equivalents, end of period	150,359	100,410
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) operating activities	(15,549)	54,930
Investing Activities
Payments on term loan	0	0
Capital expenditures		0
Minimum royalty payments		0
Proceeds from sale-leaseback transactions		0
Proceeds from disposals and divestitures		0
Purchases of marketable securities		0
Proceeds from sales of short term investments		0
Investments in and advances to affiliates
Change in restricted cash		0
Cash provided by (used in) investing activities
Financing Activities
Contributions from parent		0
Net payments on other debt		0
Debt financing costs
Dividends paid		0
Other	(6)
Transactions with affiliates, net	15,960	(56,298)
Cash used in financing activities	15,954	(56,298)
Increase (decrease) in cash and cash equivalents	405	(1,368)
Cash and cash equivalents, beginning of period	11,348	12,841
Cash and cash equivalents, end of period	11,753	11,473
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) operating activities		0
Investing Activities
Payments on term loan	0
Capital expenditures		0
Minimum royalty payments		0
Proceeds from sale-leaseback transactions		0
Proceeds from disposals and divestitures		0
Purchases of marketable securities		0
Proceeds from sales of short term investments		0
Investments in and advances to affiliates		384
Change in restricted cash		0
Cash provided by (used in) investing activities		384
Financing Activities
Contributions from parent		(384)
Net payments on other debt
Debt financing costs
Dividends paid
Other	0
Transactions with affiliates, net		0
Cash used in financing activities		(384)
Increase (decrease) in cash and cash equivalents		0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	$ 0	$ 0