Consolidated Statements Of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
INTEREST AND DIVIDEND INCOME:
Loans receivable	$ 60,675	$ 65,943
Mortgage-backed securities ("MBS")	18,373	15,440
Investment securities	4,637	4,775
Capital stock of FHLB	1,091	902
Cash and cash equivalents	51	187
Total interest and dividend income	84,827	87,247
INTEREST EXPENSE:
FHLB advances	22,339	23,131
Deposits	12,787	17,381
Other borrowings	4,327	6,730
Total interest expense	39,453	47,242
NET INTEREST INCOME	45,374	40,005
PROVISION FOR CREDIT LOSSES	540	650
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	44,834	39,355
OTHER INCOME:
Retail fees and charges	4,164	3,943
Loan fees	575	655
Insurance commissions	569	818
Income from BOLI	412	332
Other income, net	432	569
Total other income	6,152	6,317
OTHER EXPENSES:
Salaries and employee benefits	10,587	9,991
Communications, information technology, and occupancy	3,909	3,876
Regulatory and outside services	1,435	1,189
Deposit and loan transaction costs	1,230	1,352
Federal insurance premium	1,092	1,858
Advertising and promotional	910	831
Contribution to Capitol Federal Foundation ("Foundation")		40,000
Other expenses, net	2,904	4,241
Total other expenses	22,067	63,338
INCOME (LOSS) BEFORE INCOME TAX EXPENSE	28,919	(17,666)
INCOME TAX EXPENSE (BENEFIT)	10,130	(6,408)
NET INCOME (LOSS)	$ 18,789	$ (11,258)
Basic earnings (loss) per common share	$ 0.12	$ (0.07)
Diluted earnings (loss) per common share	$ 0.12	$ (0.07)
Dividends declared per public share	$ 0.18	$ 0.80
Basic weighted average common shares	161,922,633	165,540,789
Diluted weighted average common shares	161,930,727	165,540,789