Convertible Senior Notes (Schedule Of Interest Expense Capitalized Associated With Construction In Progress) (Details) (USD $) In Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Convertible Senior Notes [Abstract]
Coupon interest expense	$ 3,076	$ 3,007	$ 7,060	$ 9,448
Non-cash interest from debt discount	4,222	3,768	10,452	11,626
Total capitalized interest	$ 7,298	$ 6,775	$ 17,512	$ 21,074

Total interest costs incurred during the period that are capitalized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 34

-Paragraph 21

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration