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Earnings Per Share (Details Textual) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014 2.25% Convertible Notes [Member]	Sep. 02, 2014 2.25% Convertible Notes [Member]	Sep. 30, 2014 2.25% Warrants [Member]	Sep. 30, 2014 3.00% Notes [Member]	Sep. 30, 2014 3.00% Warrants [Member]	Sep. 30, 2014 3.00% Convertible Notes [Member]	Jun. 30, 2014 3.00% Convertible Notes [Member]	Jun. 25, 2014 3.00% Convertible Notes [Member]
Earnings Per Share (Textual) [Abstract]
Debt interest rate	2.25%		2.25%	3.00%	3.00%
Debt Instrument, Repurchased Face Amount						$ 22.6	$ 92.5
Debt Instrument, Face Amount	$ 182.8	$ 182.5						$ 115.0

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

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