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Note 13 - Subordinated Debentures (Detail) (USD $)
1 Months Ended 10 Months Ended 7 Months Ended
Jan. 20, 2006
Oct. 18, 2004
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Preferred Trust Securities [Member]
Dec. 31, 2011
Preferred Trust Securities [Member]
Jan. 20, 2006
Preferred Trust Securities [Member]
Oct. 18, 2004
Preferred Trust Securities [Member]
Jul. 30, 2007
Both Trusts [Member]
Jul. 30, 2007
Trust One [Member]
Jul. 30, 2007
Trust Two [Member]
Proceeds from Issuance of Trust Preferred Securities (in Dollars) $ 10,310,000 $ 10,310,000             $ 15,464,000 $ 7,732,000 $ 7,732,000
Debt Instrument, Interest Rate, Stated Percentage             6.049% 1.99%   6.71% 6.566%
Debt Instrument, Basis Spread on Variable Rate           1.27%       1.35% 1.35%
Subordinated Debt (in Dollars)     $ 36,084,000 $ 36,084,000 $ 1,084,000