Allowance for Losses on Loans (Impaired Loans Based on Loan Types) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 491,411	$ 454,557
Unpaid Principal Balance	545,673	510,623
Related Allowance	15,579	18,610
Average Recorded Investment	456,247	425,267
Amount of related allowance included in specific reserves	1,606	3,473
Amount of related allowance included in general reserves	13,973	15,137
Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	71,293	80,772
Unpaid Principal Balance	116,003	126,674
Related Allowance	0	0
Average Recorded Investment	60,579	43,952
Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	420,118	373,785
Unpaid Principal Balance	429,670	383,949
Related Allowance	15,579	18,610
Average Recorded Investment	395,668	381,315
Single-Family Residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	388,263	369,023
Unpaid Principal Balance	398,529	380,838
Related Allowance	13,973	15,137
Average Recorded Investment	369,977	351,865
Single-Family Residential [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	32,815	33,883
Unpaid Principal Balance	36,758	38,928
Related Allowance	0	0
Average Recorded Investment	26,315	21,458
Single-Family Residential [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	355,448	335,140
Unpaid Principal Balance	361,771	341,910
Related Allowance	13,973	15,137
Average Recorded Investment	343,662	330,407
Construction - Speculative [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	13,759	12,783
Unpaid Principal Balance	14,487	13,441
Related Allowance	535	1,100
Average Recorded Investment	11,186	15,701
Construction - Speculative [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,324	3,891
Unpaid Principal Balance	2,602	4,099
Related Allowance	0	0
Average Recorded Investment	1,734	3,339
Construction - Speculative [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	11,435	8,892
Unpaid Principal Balance	11,885	9,342
Related Allowance	535	1,100
Average Recorded Investment	9,452	12,362
Construction - Custom [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,196	0
Unpaid Principal Balance	1,196	0
Related Allowance	0	0
Average Recorded Investment	660	0
Construction - Custom [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	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	660	0
Land - Acquisition & Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	12,936	5,618
Unpaid Principal Balance	21,631	14,707
Related Allowance	1,071	0
Average Recorded Investment	8,678	10,863
Land - Acquisition & Development [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,071	3,020
Unpaid Principal Balance	10,527	10,705
Related Allowance	0	0
Average Recorded Investment	2,846	2,548
Land - Acquisition & Development [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	9,865	2,598
Unpaid Principal Balance	11,104	4,002
Related Allowance	1,071	0
Average Recorded Investment	5,832	8,315
Land - Consumer Lot Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	16,450	15,817
Unpaid Principal Balance	16,978	16,390
Related Allowance	0	2,222
Average Recorded Investment	19,247	14,140
Land - Consumer Lot Loans [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,039	3,186
Unpaid Principal Balance	3,184	3,376
Related Allowance	0	0
Average Recorded Investment	3,697	1,839
Land - Consumer Lot Loans [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	13,411	12,631
Unpaid Principal Balance	13,794	13,014
Related Allowance	0	2,222
Average Recorded Investment	15,550	12,301
Multi-Family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	9,508	10,887
Unpaid Principal Balance	9,769	11,107
Related Allowance	0	46
Average Recorded Investment	5,950	9,465
Multi-Family [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	807	4,929
Unpaid Principal Balance	848	4,929
Related Allowance	0	0
Average Recorded Investment	605	1,734
Multi-Family [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	8,701	5,958
Unpaid Principal Balance	8,921	6,178
Related Allowance	0	46
Average Recorded Investment	5,345	7,731
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	40,007	31,076
Unpaid Principal Balance	49,343	40,352
Related Allowance	0	105
Average Recorded Investment	27,969	18,972
Commercial Real Estate [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	21,258	23,537
Unpaid Principal Balance	29,657	31,876
Related Allowance	0	0
Average Recorded Investment	15,872	9,651
Commercial Real Estate [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	18,749	7,539
Unpaid Principal Balance	19,686	8,476
Related Allowance	0	105
Average Recorded Investment	12,097	9,321
Commercial & Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,027	7,335
Unpaid Principal Balance	30,776	31,253
Related Allowance	0	0
Average Recorded Investment	5,265	3,134
Commercial & Industrial [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,983	7,279
Unpaid Principal Balance	30,732	31,197
Related Allowance	0	0
Average Recorded Investment	5,130	3,123
Commercial & Industrial [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	44	56
Unpaid Principal Balance	44	56
Related Allowance	0	0
Average Recorded Investment	135	11
HELOC [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,590	1,384
Unpaid Principal Balance	2,253	1,884
Related Allowance	0	0
Average Recorded Investment	3,632	991
HELOC [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	392	446
Unpaid Principal Balance	1,055	946
Related Allowance	0	0
Average Recorded Investment	1,128	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	2,504	858
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	675	634
Unpaid Principal Balance	711	651
Related Allowance	0	0
Average Recorded Investment	3,683	136
Consumer [Member] | Financing Receivable, Impairment, No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	604	601
Unpaid Principal Balance	640	618
Related Allowance	0	0
Average Recorded Investment	3,252	127
Consumer [Member] | Financing Receivable, Impairment, Allowance Recorded [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	71	33
Unpaid Principal Balance	71	33
Related Allowance	0	0
Average Recorded Investment	$ 431	$ 9