Stockholders' Equity (Details) (USD $)	0 Months Ended	3 Months Ended				12 Months Ended					3 Months Ended		3 Months Ended
	Aug. 01, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2012	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2014 Stock Compensation Plan [Member]	Sep. 30, 2014 Employee Stock Purchase Plan [Member]	Dec. 31, 2012 Accelerated Dividend [Member]	Jun. 30, 2014 Convertible Senior Note One [Member]	Dec. 31, 2014 Subsequent Event [Member]
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common stock, shares issued		371,786,765				371,786,765	330,143,689
Common stock, shares outstanding		364,586,694				364,586,694	322,943,618
Preferred Stock, Shares Issued		0				0	0
Common Stock reserved for issuance									23,200,000	3,500,000
Amount of stock repurchase authorization	$ 100,000,000
Amount remaining under stock repurchase authorization		100,000,000
Dividends, Common Stock [Abstract]
Cash dividends declared per common share		$ 0.0625	$ 0.0375	$ 0.0375	$ 0.0375	$ 0.1375	$ 0.1875	$ 0.15			$ 0.15		$ 0.0625
Debt Conversion, Converted Instrument, Shares Issued			77.18004			38,589,451
Debt Instrument, Face Amount												$ 1,000
Debt Instrument, Convertible, Conversion Price												$ 12.96