Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical) (Retained Earnings, USD $)	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Retained Earnings
Dividends paid on common stock (per share)	$ 0.08	$ 0.15

Aggregate dividends paid 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

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Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	duration