Note E - Allowance for Losses on Loans Internally Assigned Grade (Details) (USD $)	Jun. 30, 2011	Sep. 30, 2010	Jun. 30, 2011 Residential Portfolio Segment [Member]	Sep. 30, 2010 Residential Portfolio Segment [Member]	Jun. 30, 2011 Residential Portfolio Segment [Member] Pass [Member]	Jun. 30, 2011 Residential Portfolio Segment [Member] Special Mention [Member]	Jun. 30, 2011 Residential Portfolio Segment [Member] Substandard [Member]	Jun. 30, 2011 Residential Portfolio Segment [Member] Doubtful [Member]	Jun. 30, 2011 Residential Portfolio Segment [Member] Loss [Member]	Jun. 30, 2011 Construction, Speculative [Member]	Sep. 30, 2010 Construction, Speculative [Member]	Jun. 30, 2011 Construction, Speculative [Member] Pass [Member]	Jun. 30, 2011 Construction, Speculative [Member] Special Mention [Member]	Jun. 30, 2011 Construction, Speculative [Member] Substandard [Member]	Jun. 30, 2011 Construction, Speculative [Member] Doubtful [Member]	Jun. 30, 2011 Construction, Speculative [Member] Loss [Member]	Jun. 30, 2011 Construction, Custom [Member]	Sep. 30, 2010 Construction, Custom [Member]	Jun. 30, 2011 Construction, Custom [Member] Pass [Member]	Jun. 30, 2011 Construction, Custom [Member] Special Mention [Member]	Jun. 30, 2011 Construction, Custom [Member] Substandard [Member]	Jun. 30, 2011 Construction, Custom [Member] Doubtful [Member]	Jun. 30, 2011 Construction, Custom [Member] Loss [Member]	Jun. 30, 2011 Land, Acquisition and Development [Member]	Sep. 30, 2010 Land, Acquisition and Development [Member]	Jun. 30, 2011 Land, Acquisition and Development [Member] Pass [Member]	Jun. 30, 2011 Land, Acquisition and Development [Member] Special Mention [Member]	Jun. 30, 2011 Land, Acquisition and Development [Member] Substandard [Member]	Jun. 30, 2011 Land, Acquisition and Development [Member] Doubtful [Member]	Jun. 30, 2011 Land, Acquisition and Development [Member] Loss [Member]	Jun. 30, 2011 Land, Consumer Lot Loans [Member]	Sep. 30, 2010 Land, Consumer Lot Loans [Member]	Jun. 30, 2011 Land, Consumer Lot Loans [Member] Pass [Member]	Jun. 30, 2011 Land, Consumer Lot Loans [Member] Special Mention [Member]	Jun. 30, 2011 Land, Consumer Lot Loans [Member] Substandard [Member]	Jun. 30, 2011 Land, Consumer Lot Loans [Member] Doubtful [Member]	Jun. 30, 2011 Land, Consumer Lot Loans [Member] Loss [Member]	Jun. 30, 2011 Multi Family Housing [Member]	Sep. 30, 2010 Multi Family Housing [Member]	Jun. 30, 2011 Multi Family Housing [Member] Pass [Member]	Jun. 30, 2011 Multi Family Housing [Member] Special Mention [Member]	Jun. 30, 2011 Multi Family Housing [Member] Substandard [Member]	Jun. 30, 2011 Multi Family Housing [Member] Doubtful [Member]	Jun. 30, 2011 Multi Family Housing [Member] Loss [Member]	Jun. 30, 2011 Commercial Real Estate Portfolio Segment [Member]	Sep. 30, 2010 Commercial Real Estate Portfolio Segment [Member]	Jun. 30, 2011 Commercial Real Estate Portfolio Segment [Member] Pass [Member]	Jun. 30, 2011 Commercial Real Estate Portfolio Segment [Member] Special Mention [Member]	Jun. 30, 2011 Commercial Real Estate Portfolio Segment [Member] Substandard [Member]	Jun. 30, 2011 Commercial Real Estate Portfolio Segment [Member] Doubtful [Member]	Jun. 30, 2011 Commercial Real Estate Portfolio Segment [Member] Loss [Member]	Jun. 30, 2011 Commercial and Industrial Loans [Member]	Sep. 30, 2010 Commercial and Industrial Loans [Member]	Jun. 30, 2011 Commercial and Industrial Loans [Member] Pass [Member]	Jun. 30, 2011 Commercial and Industrial Loans [Member] Special Mention [Member]	Jun. 30, 2011 Commercial and Industrial Loans [Member] Substandard [Member]	Jun. 30, 2011 Commercial and Industrial Loans [Member] Doubtful [Member]	Jun. 30, 2011 Commercial and Industrial Loans [Member] Loss [Member]	Jun. 30, 2011 Home Equity Line of Credit [Member]	Sep. 30, 2010 Home Equity Line of Credit [Member]	Jun. 30, 2011 Home Equity Line of Credit [Member] Pass [Member]	Jun. 30, 2011 Home Equity Line of Credit [Member] Special Mention [Member]	Jun. 30, 2011 Home Equity Line of Credit [Member] Substandard [Member]	Jun. 30, 2011 Home Equity Line of Credit [Member] Doubtful [Member]	Jun. 30, 2011 Home Equity Line of Credit [Member] Loss [Member]	Jun. 30, 2011 Consumer Portfolio Segment [Member]	Sep. 30, 2010 Consumer Portfolio Segment [Member]	Jun. 30, 2011 Consumer Portfolio Segment [Member] Pass [Member]	Jun. 30, 2011 Consumer Portfolio Segment [Member] Special Mention [Member]	Jun. 30, 2011 Consumer Portfolio Segment [Member] Substandard [Member]	Jun. 30, 2011 Consumer Portfolio Segment [Member] Doubtful [Member]	Jun. 30, 2011 Consumer Portfolio Segment [Member] Loss [Member]	Jun. 30, 2011 Pass [Member]	Jun. 30, 2011 Special Mention [Member]	Jun. 30, 2011 Substandard [Member]	Jun. 30, 2011 Doubtful [Member]	Jun. 30, 2011 Loss [Member]	Jun. 30, 2011 Nonperforming Financing Receivable [Member]	Jun. 30, 2010 Nonperforming Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 8,386,503,000	$ 8,777,106,000	$ 6,281,072,000	$ 6,551,837,000	$ 6,149,861,000	$ 0	$ 131,211,000	$ 0	$ 0	$ 143,964,000	$ 169,712,000	$ 31,871,000	$ 5,484,000	$ 106,609,000	$ 0	$ 0	$ 270,894,000	$ 256,384,000	$ 270,894,000	$ 0	$ 0	$ 0	$ 0	$ 230,901,000	$ 307,230,000	$ 42,791,000	$ 2,470,000	$ 185,640,000	$ 0	$ 0	$ 169,714,000	$ 186,840,000	$ 169,590,000	$ 0	$ 124,000	$ 0	$ 0	$ 717,107,000	$ 697,351,000	$ 680,729,000	$ 3,756,000	$ 32,622,000	$ 0	$ 0	$ 303,023,000	$ 315,915,000	$ 263,993,000	$ 4,345,000	$ 34,685,000	$ 0	$ 0	$ 82,091,000	$ 83,070,000	$ 75,834,000	$ 1,316,000	$ 4,941,000	$ 0	$ 0	$ 114,676,000	$ 116,143,000	$ 114,676,000	$ 0	$ 0	$ 0	$ 0	$ 73,061,000	$ 92,624,000	$ 72,264,000	$ 511,000	$ 286,000	$ 0	$ 0	$ 7,872,503,000	$ 17,882,000	$ 496,118,000	$ 0	$ 0	$ 394,679,000	$ 473,121,000
Grade as Percentage of Total Gross Loans																																																																									93.90%	0.20%	5.90%	0.00%	0.00%	2.96%	3.45%