Subsequent Events (Details) (Old Plank Trail Community Bank [Member], USD $) In Millions, unless otherwise specified	0 Months Ended
Apr. 13, 2012
Old Plank Trail Community Bank [Member]
Subsequent Event [Line Items]
Date of acquisition agreement	April 13, 2012
Deposits acquired	$ 52
Loans acquired	$ 3

Month, day and year when the business acquisition agreement was executed.

No definition available.

Name:	us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement
Namespace Prefix:	us-gaap_
Data Type:	us-types:dateStringItemType
Balance Type:	na
Period Type:	duration