SUBORDINATED DEBENTURES AND TRUST PREFERRED SECURITIES (Details) (USD $)	12 Months Ended
Sep. 30, 2014 Period	Sep. 30, 2013
Subsidiary or Equity Method Investee [Line Items]
Cumulative cash distribution calculated at variable rate basis	LIBOR
Basis spread on variable rate (in hundredths)	3.75%
Effective interest rate (in hundredths)	4.08%	4.15%
Effective interest rate, maximum (in hundredths)	12.50%
Number of consecutive semi-annual periods that interest payments on capital securities may be deferred	10
Redemption price per capital security (in dollars per share)	$ 1,000
First Midwest Financial Capital Trust I [Member]
Subsidiary or Equity Method Investee [Line Items]
Equity method investment, ownership percentage (in hundredths)	100.00%
Issuance of trust preferred securities (in shares)	10,000

- Definition

Amount to be paid per share that is classified as temporary equity by entity upon redemption. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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