Supplemental Condensed Consolidating Financial Information (Schedule Of Condensed Consolidating Statements Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash provided by (used in) operating activities	$ 43,291	$ 54,990
Investing Activities
Change in restricted cash	1,163	1,455
Capital expenditures	(54,522)	(93,271)
Proceeds from dispositions of property, plant and equipment	714	22,105
Investments in and advances to affiliates	(4,298)	(5,777)
Purchases of short term investments	(26,787)
Proceeds from Sale of Short-term Investments	11,534
Minimum royalty payments	(9,142)	(8,262)
Cash used in investing activities	(81,338)	(83,750)
Financing Activities
Contributions from parent
Net increase (decrease) in borrowings under lines of credit		34,000
Payments on term note	(4,125)
Net payments on other debt	(5,964)	(7,323)
Payments of Financing Costs		(100)
Dividends paid	(6,367)	(23,327)
Issuance of common stock under incentive plans		5,131
Transactions with affiliates, net
Cash provided by (used in) financing activities	(16,456)	8,381
Increase (decrease) in cash and cash equivalents	(54,503)	(20,379)
Cash and cash equivalents, beginning of period	784,622	138,149
Cash and cash equivalents, end of period	730,119	117,770
Parent/Issuer [Member]
Cash provided by (used in) operating activities	(61,840)	(39,702)
Investing Activities
Change in restricted cash	1,163	1,455
Capital expenditures	(615)	(1,177)
Proceeds from dispositions of property, plant and equipment
Investments in and advances to affiliates	(2,043)	(3,619)
Purchases of short term investments	(26,787)
Proceeds from Sale of Short-term Investments	11,534
Minimum royalty payments
Cash used in investing activities	(16,748)	(3,341)
Financing Activities
Contributions from parent
Net increase (decrease) in borrowings under lines of credit		50,000
Payments on term note	(4,125)
Net payments on other debt	(5,836)	(5,993)
Payments of Financing Costs		(54)
Dividends paid	(6,367)	(23,327)
Issuance of common stock under incentive plans		5,131
Transactions with affiliates, net	20,911	(14,060)
Cash provided by (used in) financing activities	4,583	11,697
Increase (decrease) in cash and cash equivalents	(74,005)	(31,346)
Cash and cash equivalents, beginning of period	671,313	66,542
Cash and cash equivalents, end of period	597,308	35,196
Guarantor Subsidiaries [Member]
Cash provided by (used in) operating activities	120,755	19,456
Investing Activities
Change in restricted cash
Capital expenditures	(53,907)	(92,094)
Proceeds from dispositions of property, plant and equipment	714	608
Investments in and advances to affiliates	(2,383)	(3,488)
Purchases of short term investments
Proceeds from Sale of Short-term Investments
Minimum royalty payments	(9,142)	(8,262)
Cash used in investing activities	(64,718)	(103,236)
Financing Activities
Contributions from parent	128	1,330
Net increase (decrease) in borrowings under lines of credit
Payments on term note
Net payments on other debt	(128)	(1,330)
Payments of Financing Costs		0
Dividends paid
Issuance of common stock under incentive plans
Transactions with affiliates, net	(36,076)	84,037
Cash provided by (used in) financing activities	(36,076)	84,037
Increase (decrease) in cash and cash equivalents	19,961	257
Cash and cash equivalents, beginning of period	100,468	70,258
Cash and cash equivalents, end of period	120,429	70,515
Non-Guarantor Subsidiaries [Member]
Cash provided by (used in) operating activities	(15,624)	75,236
Investing Activities
Change in restricted cash
Capital expenditures
Proceeds from dispositions of property, plant and equipment		21,497
Investments in and advances to affiliates
Purchases of short term investments
Proceeds from Sale of Short-term Investments
Minimum royalty payments
Cash used in investing activities		21,497
Financing Activities
Contributions from parent
Net increase (decrease) in borrowings under lines of credit		(16,000)
Payments on term note
Net payments on other debt
Payments of Financing Costs		(46)
Dividends paid
Issuance of common stock under incentive plans
Transactions with affiliates, net	15,165	(69,977)
Cash provided by (used in) financing activities	15,165	(86,023)
Increase (decrease) in cash and cash equivalents	(459)	10,710
Cash and cash equivalents, beginning of period	12,841	1,349
Cash and cash equivalents, end of period	12,382	12,059
Eliminations [Member]
Cash provided by (used in) operating activities
Investing Activities
Change in restricted cash
Capital expenditures
Proceeds from dispositions of property, plant and equipment
Investments in and advances to affiliates	128	1,330
Purchases of short term investments
Proceeds from Sale of Short-term Investments
Minimum royalty payments
Cash used in investing activities	128	1,330
Financing Activities
Contributions from parent	(128)	(1,330)
Net increase (decrease) in borrowings under lines of credit
Payments on term note
Net payments on other debt
Payments of Financing Costs		0
Dividends paid
Issuance of common stock under incentive plans
Transactions with affiliates, net
Cash provided by (used in) financing activities	(128)	(1,330)
Increase (decrease) in cash and cash equivalents
Cash and cash equivalents, beginning of period
Cash and cash equivalents, end of period