Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) (USD $)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) [Abstract]
Cash dividends declared on common stock (in dollars per share)	$ 0.13	$ 0.13
Issuance of common shares from treasury stock due to issuance of restricted stock (in shares)	44,398	1,050

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=6959260&loc=d3e187085-122770

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