Condensed Consolidated Statements of Stockholders' Equity (unaudited) (Parenthetical) - $ / shares	3 Months Ended	6 Months Ended
Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014
Condensed Consolidated Statements of Stockholders' Equity (unaudited) [Abstract]
Cash dividends on common stock ( in dollars per share)	$ 0.06	$ 0.05	$ 0.05

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

Reference 1: 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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