Allowance for Losses on Loans (Impaired Loans Based on Loan Types) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Jun. 30, 2014	Sep. 30, 2013
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 451,243	$ 454,557
Unpaid Principal Balance	498,433	510,623
Related Allowance	11,016	18,610
Average Recorded Investment	440,641	425,267
Amount of related allowance included in specific reserves	60	3,473
Amount of related allowance included in general reserves	10,956	15,137
Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	63,453	80,772
Unpaid Principal Balance	102,038	126,674
Related Allowance	0	0
Average Recorded Investment	55,562	43,952
Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	387,790	373,785
Unpaid Principal Balance	396,395	383,949
Related Allowance	11,016	18,610
Average Recorded Investment	385,079	381,315
Single-Family Residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	358,743	369,023
Unpaid Principal Balance	367,431	380,838
Related Allowance	10,956	15,137
Average Recorded Investment	355,987	351,865
Single-Family Residential [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	24,929	33,883
Unpaid Principal Balance	27,853	38,928
Related Allowance	0	0
Average Recorded Investment	22,460	21,458
Single-Family Residential [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	333,814	335,140
Unpaid Principal Balance	339,578	341,910
Related Allowance	10,956	15,137
Average Recorded Investment	333,527	330,407
Construction - Speculative [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	10,506	12,783
Unpaid Principal Balance	11,559	13,441
Related Allowance	60	1,100
Average Recorded Investment	10,689	15,701
Construction - Speculative [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,755	3,891
Unpaid Principal Balance	2,378	4,099
Related Allowance	0	0
Average Recorded Investment	1,762	3,339
Construction - Speculative [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	8,751	8,892
Unpaid Principal Balance	9,181	9,342
Related Allowance	60	1,100
Average Recorded Investment	8,927	12,362
Construction - Custom [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,556	0
Unpaid Principal Balance	1,556	0
Related Allowance	0	0
Average Recorded Investment	1,376	0
Construction - Custom [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	360	0
Unpaid Principal Balance	360	0
Related Allowance	0	0
Average Recorded Investment	180	0
Construction - Custom [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,196	0
Unpaid Principal Balance	1,196	0
Related Allowance	0	0
Average Recorded Investment	1,196	0
Land - Acquisition & Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,026	5,618
Unpaid Principal Balance	14,963	14,707
Related Allowance	0	0
Average Recorded Investment	6,879	10,863
Land - Acquisition & Development [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,934	3,020
Unpaid Principal Balance	8,931	10,705
Related Allowance	0	0
Average Recorded Investment	1,794	2,548
Land - Acquisition & Development [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,092	2,598
Unpaid Principal Balance	6,032	4,002
Related Allowance	0	0
Average Recorded Investment	5,085	8,315
Land - Consumer Lot Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	13,734	15,817
Unpaid Principal Balance	14,215	16,390
Related Allowance	0	2,222
Average Recorded Investment	13,566	14,140
Land - Consumer Lot Loans [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	812	3,186
Unpaid Principal Balance	910	3,376
Related Allowance	0	0
Average Recorded Investment	714	1,839
Land - Consumer Lot Loans [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	12,922	12,631
Unpaid Principal Balance	13,305	13,014
Related Allowance	0	2,222
Average Recorded Investment	12,852	12,301
Multi-Family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,396	10,887
Unpaid Principal Balance	5,616	11,107
Related Allowance	0	46
Average Recorded Investment	5,408	9,465
Multi-Family [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	130	4,929
Unpaid Principal Balance	130	4,929
Related Allowance	0	0
Average Recorded Investment	130	1,734
Multi-Family [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,266	5,958
Unpaid Principal Balance	5,486	6,178
Related Allowance	0	46
Average Recorded Investment	5,278	7,731
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	47,316	31,076
Unpaid Principal Balance	55,064	40,352
Related Allowance	0	105
Average Recorded Investment	40,462	18,972
Commercial Real Estate [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	28,024	23,537
Unpaid Principal Balance	34,904	31,876
Related Allowance	0	0
Average Recorded Investment	23,625	9,651
Commercial Real Estate [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	19,292	7,539
Unpaid Principal Balance	20,160	8,476
Related Allowance	0	105
Average Recorded Investment	16,837	9,321
Commercial & Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,939	7,335
Unpaid Principal Balance	24,206	31,253
Related Allowance	0	0
Average Recorded Investment	3,836	3,134
Commercial & Industrial [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,916	7,279
Unpaid Principal Balance	24,183	31,197
Related Allowance	0	0
Average Recorded Investment	3,809	3,123
Commercial & Industrial [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	23	56
Unpaid Principal Balance	23	56
Related Allowance	0	0
Average Recorded Investment	27	11
HELOC [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,352	1,384
Unpaid Principal Balance	3,033	1,884
Related Allowance	0	0
Average Recorded Investment	1,906	991
HELOC [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,154	446
Unpaid Principal Balance	1,835	946
Related Allowance	0	0
Average Recorded Investment	708	133
HELOC [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,198	938
Unpaid Principal Balance	1,198	938
Related Allowance	0	0
Average Recorded Investment	1,198	858
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	675	634
Unpaid Principal Balance	790	651
Related Allowance	0	0
Average Recorded Investment	532	136
Consumer [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	439	601
Unpaid Principal Balance	554	618
Related Allowance	0	0
Average Recorded Investment	380	127
Consumer [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	236	33
Unpaid Principal Balance	236	33
Related Allowance	0	0
Average Recorded Investment	$ 152	$ 9