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

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

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Stockholders' Equity - Common Stock (Details) (USD $)	3 Months Ended								0 Months Ended
Stockholders' Equity - Common Stock (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Oct. 28, 2014	Jul. 28, 2014	Apr. 29, 2014	Feb. 26, 2014	Nov. 04, 2013	Jul. 31, 2013	May 01, 2013	Feb. 27, 2013
Class of Stock [Line Items]
Dividend Amount	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.40
Common Stock [Member]
Class of Stock [Line Items]
Dividend Amount									$ 0.4	$ 0.4	$ 0.4	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.40