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Stockholders' Equity - Stock Options Granted (Details) (USD $)	83 Months Ended	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2014 April 16, 2013 [Member]	Mar. 31, 2014 April 17, 2012 [Member]	Mar. 31, 2014 April 19, 2011 [Member]	Mar. 31, 2014 April 20, 2010 [Member]	Mar. 31, 2014 April 21, 2009 [Member]	Mar. 31, 2014 April 15, 2008 [Member]	Mar. 31, 2014 April 17, 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	8,100,000	205,000	1,235,000	410,000	530,000	790,000	550,000	4,380,000
Option Exercise (Strike) Price		$ 54.00	$ 54.00	$ 35.00	$ 30.00	$ 27.00	$ 27.00	$ 22.50
Closing Stock Price on Date of Grant		$ 49.25	$ 49.01	$ 31.78	$ 27.13	$ 17.61	$ 24.35	$ 20.15
Options Outstanding	4,255,855	172,500	1,115,000	340,000	300,000	411,600	197,500	1,719,255
Options Exercisable	1,371,605	0	0	25,000	0	171,600	103,750	1,071,255

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ 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)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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

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Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: 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



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-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

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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No definition available.

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Price of a single share of a number of saleable stocks of a company.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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