Loans Receivable - Summary of Covered Loans Receivable (Details) (USD $)	Mar. 31, 2015	Sep. 30, 2014
Loans covered by loss sharing agreements:
Loans and leases receivable, net reported amount, covered	$ 49,093,906	$ 69,634,219
Impaired loans at acquisition
Loans covered by loss sharing agreements:
Loans receivable	32,184,207
Nonaccretable difference	3,161,562	5,993,661
Allowance for covered loan losses	0	0
Accretable discount	2,765,732	3,073,198
Discount on acquired performing loans	0	0
Unamortized loan origination fees, net	0	0
Loans and leases receivable, net reported amount, covered	26,256,913	30,701,371
All other acquired loans
Loans covered by loss sharing agreements:
Loans receivable	25,595,990
Nonaccretable difference	249,204	273,024
Allowance for covered loan losses	946,314	997,524
Accretable discount	1,443,969	2,770,499
Discount on acquired performing loans	112,361	142,731
Unamortized loan origination fees, net	7,149	17,253
Loans and leases receivable, net reported amount, covered	22,836,993	38,932,848
1-4 family residential real estate | Impaired loans at acquisition
Loans covered by loss sharing agreements:
Loans receivable	3,141,212	4,841,705
1-4 family residential real estate | All other acquired loans
Loans covered by loss sharing agreements:
Loans receivable	5,256,205	6,800,846
Commercial real estate | Impaired loans at acquisition
Loans covered by loss sharing agreements:
Loans receivable	27,761,821	33,053,228
Commercial real estate | All other acquired loans
Loans covered by loss sharing agreements:
Loans receivable	19,617,148	34,354,816
Commercial | Impaired loans at acquisition
Loans covered by loss sharing agreements:
Loans receivable	1,281,174	1,871,879
Commercial | All other acquired loans
Loans covered by loss sharing agreements:
Loans receivable	650,067	1,800,989
Real estate construction | Impaired loans at acquisition
Loans covered by loss sharing agreements:
Loans receivable	0	0
Real estate construction | All other acquired loans
Loans covered by loss sharing agreements:
Loans receivable	0	0
Consumer and other | Impaired loans at acquisition
Loans covered by loss sharing agreements:
Loans receivable	0	1,418
Consumer and other | All other acquired loans
Loans covered by loss sharing agreements:
Loans receivable	72,570	177,228
Covered loans
Loans covered by loss sharing agreements:
Loans receivable	57,780,197	82,902,109
Nonaccretable difference	3,410,766	6,266,685
Allowance for covered loan losses	946,314	997,524
Accretable discount	4,209,701	5,843,697
Discount on acquired performing loans	112,361	142,731
Unamortized loan origination fees, net	7,149	17,253
Covered loans | Impaired loans at acquisition
Loans covered by loss sharing agreements:
Loans receivable		39,768,230
Covered loans | All other acquired loans
Loans covered by loss sharing agreements:
Loans receivable		43,133,879
Covered loans | 1-4 family residential real estate
Loans covered by loss sharing agreements:
Loans receivable	8,397,417	11,642,551
Covered loans | Commercial real estate
Loans covered by loss sharing agreements:
Loans receivable	47,378,969	67,408,044
Covered loans | Commercial
Loans covered by loss sharing agreements:
Loans receivable	1,931,241	3,672,868
Covered loans | Real estate construction
Loans covered by loss sharing agreements:
Loans receivable	0	0
Covered loans | Consumer and other
Loans covered by loss sharing agreements:
Loans receivable	$ 72,570	$ 178,646