Supplemental Condensed Consolidating Financial Information (Schedule Of Condensed Consolidating Statements Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) operating activities	$ (78,346)	$ 52,045
Investing Activities
Capital expenditures	(95,746)	(169,064)
Payments of minimum royalties	(3,341)	(10,162)
Proceeds from sale-leaseback transactions	0	5,080
Proceeds from disposals and divestitures	43,245	34,919
Purchases of short term investments	(168,951)	(61,870)
Proceeds from sales of short term investments	166,018	47,097
Investments in and advances to affiliates	(9,501)	(8,142)
Change in restricted cash	0	2,368
Cash used in investing activities	(68,276)	(159,774)
Financing Activities
Contributions from parent
Payments on term loan	(9,750)	(8,250)
Net payments on other debt	(9,390)	(11,703)
Debt financing costs	(1,957)
Dividends paid	(2,123)	(12,735)
Change in restricted cash	(1,103)	0
Transactions with affiliates, net
Cash used in financing activities	(24,323)	(32,688)
Increase (decrease) in cash and cash equivalents	(170,945)	(140,417)
Cash and cash equivalents, beginning of period	911,099	784,622
Cash and cash equivalents, end of period	740,154	644,205
Parent/Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) operating activities	(268,382)	(217,517)
Investing Activities
Capital expenditures	(660)	(1,511)
Payments of minimum royalties
Proceeds from sale-leaseback transactions
Proceeds from disposals and divestitures	39,132
Purchases of short term investments	(168,951)	(61,870)
Proceeds from sales of short term investments	166,018	47,097
Investments in and advances to affiliates	(1,581)	(3,012)
Change in restricted cash		2,368
Cash used in investing activities	33,958	(16,928)
Financing Activities
Contributions from parent
Payments on term loan	(9,750)	(8,250)
Net payments on other debt	(7,547)	(11,448)
Debt financing costs	(1,957)
Dividends paid	(2,123)	(12,735)
Change in restricted cash
Transactions with affiliates, net	84,719	127,370
Cash used in financing activities	63,342	94,937
Increase (decrease) in cash and cash equivalents	(171,082)	(139,508)
Cash and cash equivalents, beginning of period	799,333	671,313
Cash and cash equivalents, end of period	628,251	531,805
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) operating activities	196,505	287,055
Investing Activities
Capital expenditures	(95,086)	(167,553)
Payments of minimum royalties	(3,341)	(10,162)
Proceeds from sale-leaseback transactions		5,080
Proceeds from disposals and divestitures	4,113	34,919
Purchases of short term investments
Proceeds from sales of short term investments
Investments in and advances to affiliates	(7,920)	(5,385)
Change in restricted cash
Cash used in investing activities	(102,234)	(143,101)
Financing Activities
Contributions from parent		255
Payments on term loan		0
Net payments on other debt	(1,843)	(255)
Debt financing costs
Dividends paid
Change in restricted cash
Transactions with affiliates, net	(92,486)	(143,975)
Cash used in financing activities	(94,329)	(143,975)
Increase (decrease) in cash and cash equivalents	(58)	(21)
Cash and cash equivalents, beginning of period	100,418	100,468
Cash and cash equivalents, end of period	100,360	100,447
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) operating activities	(6,469)	(17,493)
Investing Activities
Capital expenditures
Payments of minimum royalties
Proceeds from sale-leaseback transactions
Proceeds from disposals and divestitures
Purchases of short term investments
Proceeds from sales of short term investments
Investments in and advances to affiliates
Change in restricted cash
Cash used in investing activities
Financing Activities
Contributions from parent
Payments on term loan
Net payments on other debt
Debt financing costs
Dividends paid
Change in restricted cash	(1,103)
Transactions with affiliates, net	7,767	16,605
Cash used in financing activities	6,664	16,605
Increase (decrease) in cash and cash equivalents	195	(888)
Cash and cash equivalents, beginning of period	11,348	12,841
Cash and cash equivalents, end of period	11,543	11,953
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) operating activities
Investing Activities
Capital expenditures
Payments of minimum royalties
Proceeds from sale-leaseback transactions
Proceeds from disposals and divestitures
Purchases of short term investments
Proceeds from sales of short term investments
Investments in and advances to affiliates		255
Change in restricted cash
Cash used in investing activities		255
Financing Activities
Contributions from parent		(255)
Payments on term loan
Net payments on other debt
Debt financing costs
Dividends paid
Change in restricted cash
Transactions with affiliates, net
Cash used in financing activities		(255)
Increase (decrease) in cash and cash equivalents
Cash and cash equivalents, beginning of period
Cash and cash equivalents, end of period