Deposits Municipal Deposits (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Municipal Deposits [Abstract]
Indiana municipal deposits	$ 45.8
Percent of collateralization required by the State of Indiana	50.00%
FHLB Irrevocable letter of credit collateralizing these deposits	$ 21.3

Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.

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

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 14

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 405

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6479006&loc=d3e64164-112818

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant