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Stockholders' Equity - Stock Options Granted (Details)	9 Months Ended	101 Months Ended
	Sep. 30, 2015 $ / shares shares	Sep. 30, 2015 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted		9,948,220
Options Outstanding	5,008,342	5,008,342
Options Exercisable	2,109,640	2,109,640
April 21, 2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	893,220
Option Exercise (Strike) Price | $ / shares	$ 42.00
Closing Stock Price on Date of Grant | $ / shares	$ 41.26	$ 41.26
Options Outstanding	841,202	841,202
Options Exercisable	0	0
April 22, 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	955,000
Option Exercise (Strike) Price | $ / shares	$ 56.00
Closing Stock Price on Date of Grant | $ / shares	$ 50.53	$ 50.53
Options Outstanding	807,500	807,500
Options Exercisable	5,000	5,000
April 16, 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	205,000
Option Exercise (Strike) Price | $ / shares	$ 54.00
Closing Stock Price on Date of Grant | $ / shares	$ 49.25	$ 49.25
Options Outstanding	130,000	130,000
Options Exercisable	0	0
April 17, 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	1,235,000
Option Exercise (Strike) Price | $ / shares	$ 54.00
Closing Stock Price on Date of Grant | $ / shares	$ 49.01	$ 49.01
Options Outstanding	1,047,500	1,047,500
Options Exercisable	243,750	243,750
April 19, 2011 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	410,000
Option Exercise (Strike) Price | $ / shares	$ 35.00
Closing Stock Price on Date of Grant | $ / shares	$ 31.78	$ 31.78
Options Outstanding	253,800	253,800
Options Exercisable	143,800	143,800
April 20, 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	530,000
Option Exercise (Strike) Price | $ / shares	$ 30.00
Closing Stock Price on Date of Grant | $ / shares	$ 27.13	$ 27.13
Options Outstanding	220,850	220,850
Options Exercisable	127,100	127,100
April 21, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	790,000
Option Exercise (Strike) Price | $ / shares	$ 27.00
Closing Stock Price on Date of Grant | $ / shares	$ 17.61	$ 17.61
Options Outstanding	303,100	303,100
Options Exercisable	210,600	210,600
April 15, 2008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	550,000
Option Exercise (Strike) Price | $ / shares	$ 27.00
Closing Stock Price on Date of Grant | $ / shares	$ 24.35	$ 24.35
Options Outstanding	159,750	159,750
Options Exercisable	134,750	134,750
April 17, 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted	4,380,000
Option Exercise (Strike) Price | $ / shares	$ 22.50
Closing Stock Price on Date of Grant | $ / shares	$ 20.15	$ 20.15
Options Outstanding	1,244,640	1,244,640
Options Exercisable	1,244,640	1,244,640

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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.

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



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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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