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Stockholders' Equity (Stock Options Granted) (Details) (USD $) | 69 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2012 April 17, 2012 [Member] | Dec. 31, 2012 April 19, 2011 [Member] | Dec. 31, 2012 April 20, 2010 [Member] | Dec. 31, 2012 April 21, 2009 [Member] | Dec. 31, 2012 April 15, 2008 [Member] | Dec. 31, 2012 April 17, 2007 [Member]
Grant Date [Line Items] |  |  |  |  |  |  |
Options granted | 7,895,000 | 1,235,000 | 410,000 | 530,000 | 790,000 | 550,000 | 4,380,000
Option exercise (strike) price |  | $ 54.00 | $ 35.00 | $ 30.00 | $ 27.00 | $ 27.00 | $ 22.50
Closing stock price on date of grant |  | $ 49.01 | $ 31.78 | $ 27.13 | $ 17.61 | $ 24.35 | $ 20.15
Options outstanding | 4,835,792 | 1,177,500 | 380,000 | 380,000 | 540,000 | 286,167 | 2,072,125
Options vested | 1,168,792 | 0 | 0 | 0 | 0 | 116,167 | 1,052,625

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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(d) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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- Definition The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a) -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. + Details
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