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Note 5 - Loans Receivable (Detail) - Allowance for Loan Losses on Loans Not Covered (USD $)
 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Dec. 31, 2011
Dec. 31, 2012
Residential Real Estate 1-4 Family [Member]
Beginning [Member]
Non Covered Loans [Member]
Dec. 31, 2012
Residential Real Estate 1-4 Family [Member]
Beginning [Member]
Dec. 31, 2012
Residential Real Estate 1-4 Family [Member]
Ending [Member]
Dec. 31, 2011
Residential Real Estate 1-4 Family [Member]
Non Covered Loans [Member]
Dec. 31, 2011
Residential Real Estate 1-4 Family [Member]
Beginning [Member]
Dec. 31, 2011
Residential Real Estate 1-4 Family [Member]
Ending [Member]
Dec. 31, 2012
Residential Real Estate 1-4 Family [Member]
Dec. 31, 2011
Residential Real Estate 1-4 Family [Member]
Dec. 31, 2012
Commercial Real Estate Other Receivable [Member]
Beginning [Member]
Non Covered Loans [Member]
Dec. 31, 2012
Commercial Real Estate Other Receivable [Member]
Beginning [Member]
Dec. 31, 2012
Commercial Real Estate Other Receivable [Member]
Ending [Member]
Dec. 31, 2011
Commercial Real Estate Other Receivable [Member]
Non Covered Loans [Member]
Dec. 31, 2011
Commercial Real Estate Other Receivable [Member]
Beginning [Member]
Dec. 31, 2011
Commercial Real Estate Other Receivable [Member]
Ending [Member]
Dec. 31, 2011
Commercial Real Estate Other Receivable [Member]
Dec. 31, 2012
Commercial Real Estate Other Receivable [Member]
Dec. 31, 2011
Commercial Real Estate Other Receivable [Member]
Dec. 31, 2012
Commercial [Member]
Beginning [Member]
Non Covered Loans [Member]
Dec. 31, 2012
Commercial [Member]
Beginning [Member]
Dec. 31, 2012
Commercial [Member]
Ending [Member]
Dec. 31, 2011
Commercial [Member]
Non Covered Loans [Member]
Dec. 31, 2011
Commercial [Member]
Beginning [Member]
Dec. 31, 2011
Commercial [Member]
Ending [Member]
Dec. 31, 2011
Commercial [Member]
Dec. 31, 2012
Commercial [Member]
Dec. 31, 2011
Commercial [Member]
Dec. 31, 2012
Commercial Real Estate Construction Financing Receivable [Member]
Beginning [Member]
Dec. 31, 2012
Commercial Real Estate Construction Financing Receivable [Member]
Ending [Member]
Dec. 31, 2011
Commercial Real Estate Construction Financing Receivable [Member]
Beginning [Member]
Dec. 31, 2011
Commercial Real Estate Construction Financing Receivable [Member]
Ending [Member]
Dec. 31, 2012
Commercial Real Estate Construction Financing Receivable [Member]
Dec. 31, 2011
Commercial Real Estate Construction Financing Receivable [Member]
Dec. 31, 2012
Consumer Other Financing Receivable [Member]
Beginning [Member]
Non Covered Loans [Member]
Dec. 31, 2012
Consumer Other Financing Receivable [Member]
Beginning [Member]
Dec. 31, 2012
Consumer Other Financing Receivable [Member]
Ending [Member]
Dec. 31, 2011
Consumer Other Financing Receivable [Member]
Non Covered Loans [Member]
Dec. 31, 2011
Consumer Other Financing Receivable [Member]
Beginning [Member]
Dec. 31, 2011
Consumer Other Financing Receivable [Member]
Ending [Member]
Dec. 31, 2011
Consumer Other Financing Receivable [Member]
Dec. 31, 2012
Unallocated [Member]
Beginning [Member]
Dec. 31, 2012
Unallocated [Member]
Ending [Member]
Dec. 31, 2011
Unallocated [Member]
Beginning [Member]
Dec. 31, 2011
Unallocated [Member]
Ending [Member]
Dec. 31, 2012
Beginning [Member]
Non Covered Loans [Member]
Dec. 31, 2012
Beginning [Member]
Dec. 31, 2012
Ending [Member]
Dec. 31, 2011
Non Covered Loans [Member]
Dec. 31, 2011
Beginning [Member]
Dec. 31, 2011
Ending [Member]
Dec. 31, 2011
Balancе $ 8,382,355 $ 8,189,895     $ 879,854 $ 978,608     $ 579,755       $ 5,480,132 $ 5,690,448     $ 6,359,275         $ 711,594 $ 360,435     $ 573,046       $ 287,129 $ 479,230   $ 589,409       $ 79,627 $ 146,404     $ 63,399   $ 751,559 $ 727,230   $ 654,992   $ 8,189,895 $ 8,382,355     $ 8,819,876  
Loans:                                                                                                          
Loans Balancе 575,638,347 593,903,715 441,933,683     103,707,236         101,560,814     249,612,987           254,960,299     17,820,303           23,996,617   46,772,520       41,423,371     17,897,522       19,992,582             435,810,568        
Loans Ending balance: individually evaluated for impairment 16,968,465   15,582,700             2,244,408 5,340,489               12,010,438 7,149,582               2,707,794 3,092,629         5,825                                      
Charge-offs       (46,270)     (161,558)         (124,365)     (1,786,594)                 (81,574)                       (7,479)     (61,591)               (178,114)     (2,091,317)      
Recoveries       7,606     3,914         57,856     359           4,334     34,681                       778     2,402               70,574     41,356      
Provision         137,418     104,035         276,825     2,173,200           (355,493)     (201,891)         192,101   (476,103)         73,478     74,312     (24,329)   (173,553)     300,000     1,500,000    
Ending balance: individually evaluated for impairment                           23,092       617,544         14,923       66,818                                           38,015       684,362
Balancе $ 8,382,355 $ 8,189,895       $ 978,608   $ 633,364 $ 579,755         $ 5,690,448   $ 5,972,310 $ 6,359,275           $ 360,435   $ 821,830 $ 573,046         $ 479,230 $ 1,065,512 $ 589,409         $ 146,404   $ 48,276 $ 63,399     $ 727,230 $ 828,545 $ 654,992     $ 8,382,355   $ 9,369,837 $ 8,819,876