Regulatory Capital Requirements (Details Textual)	12 Months Ended
Dec. 31, 2012	Jan. 31, 2013	Jun. 30, 2012
Regulatory Capital Requirements (Textual) [Abstract]
Minimum Tier 1 leverage ratio to prevent from restoring capital ratios	9.00%
Tier 1 leverage capital ratio	8.70%	8.50%	9.00%
Minimum total risk-based Capital Ratio	12.00%
Maximum period to restore capital ratio to required level	90 days
Bank's Tier 1 Leverage Capital Ratio	8.70%
Bank's commitment, effective date	Mar. 31, 2013

Tier 1 Leverage Capital divided by average assets as defined in the regulations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1H

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 15

-Subparagraph 3a

-IssueDate 2006-05-01

-Chapter 17

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958568-112826

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