Securities, Held to maturity (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
Held to maturity [Abstract]
Amortized Costs	$ 161,728
Gross Unrealized Gains	10,628
Gross Unrealized Losses	193
Fair Values	172,163
U.S. Government agencies and corporations [Member]
Held to maturity [Abstract]
Amortized Costs	12,992
Gross Unrealized Gains	568
Gross Unrealized Losses	25
Fair Values	13,535
States and political subdivisions [Member]
Held to maturity [Abstract]
Amortized Costs	147,348
Gross Unrealized Gains	9,962
Gross Unrealized Losses	168
Fair Values	157,142
Mortgage-backed securities [Member]
Held to maturity [Abstract]
Amortized Costs	736
Gross Unrealized Gains	87
Gross Unrealized Losses	0
Fair Values	823
Corporate [Member]
Held to maturity [Abstract]
Amortized Costs	652
Gross Unrealized Gains	11
Gross Unrealized Losses	0
Fair Values	$ 663

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investments in debt securities which are categorized as held-to-maturity and that have scheduled maturities more than one year from the balance sheet date or operating cycle, if longer; such investments are normally measured at amortized cost (carrying value) unless circumstances indicate that the value to be recovered from the investment is less than its carried amount. The held-to-maturity category is for those securities that the Company has the positive intent and ability to hold until maturity.

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As of the balance sheet date, the excess of fair value over carrying value (amortized cost) of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding gain.

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- Definition

As of the balance sheet date, the excess of carrying value (amortized cost) over fair value of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding loss.

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