Shareholders' Equity (Details) (USD $)	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Equity [Abstract]
Prior quarter dividend paid (in dollars per share)	$ 0.30		$ 0.25
Dividend paid in the same quarter declared (in dollars per share)	$ 0.30		$ 0.25
Dividend declared (in dollars per share)	$ 0.30	$ 0.30	$ 0.25	$ 0.25

The per share amount of a dividend paid during the period which was declared in a prior period.

No definition available.

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- Definition

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

+ References

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

+ Details

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- Definition

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

+ References

+ Details

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- Details

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