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Stockholders' Equity - Schedule of Dividends Paid Previously or Declared (Details) (USD $)	3 Months Ended							12 Months Ended	0 Months Ended	9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2012	Oct. 08, 2013 Subsequent Event [Member]	Oct. 08, 2013 Subsequent Event [Member]
Stockholders' Equity Note [Abstract]
Dividends paid per share	$ 0.25	$ 0.20	$ 0.10	$ 0.21	$ 0.19	$ 0.17	$ 0.17	$ 1.24
Sub-Total								$ 0.74
Supplemental dividend paid per share				$ 0.50
Subsequent Event [Line Items]
Dividend declared per share									$ 0.25
Sub-Total										$ 0.8
Dividend paid previously or declared, per share										$ 0.8

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Aggregate dividends paid during the period for each share of common stock outstanding.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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-Name Accounting Standards Codification

-Topic 505

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