Loans and Servicing (Details 5)	Mar. 31, 2013 item loan	Dec. 31, 2012 item	Mar. 31, 2012 One-to-four family, construction loans loan
Loans modified and classified as troubled debt restructures
Number of loan modifications that resulted in the classification of TDR	0		1
Number of TDRs in default of their modified terms	0	0

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 34

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953682-111524

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant