BANK LOANS, NET, Analysis of Payment Status of Loans Held for Investment (Details) (USD $) In Thousands	Jun. 30, 2011		Sep. 30, 2010
Analysis of payment status of loans held for investment [Abstract]
30-59 Days	$ 28,955
60-89 Days	7,383
90 Days or More	67,538
Total Past Due	103,876
Current	6,223,897
Total loans held for investment, net	6,327,773	[1],[2]	6,235,899	[1]
Commercial loans [Member]
Analysis of payment status of loans held for investment [Abstract]
30-59 Days	0
60-89 Days	0
90 Days or More	0
Total Past Due	0
Current	3,758,101
Total loans held for investment, net	3,758,101	[2]
CRE construction loans [Member]
Analysis of payment status of loans held for investment [Abstract]
30-59 Days	0
60-89 Days	0
90 Days or More	0
Total Past Due	0
Current	25,078
Total loans held for investment, net	25,078	[2]
CRE loans [Member]
Analysis of payment status of loans held for investment [Abstract]
30-59 Days	19,215
60-89 Days	0
90 Days or More	5,053
Total Past Due	24,268
Current	755,673
Total loans held for investment, net	779,941	[2]
Residential mortgage - First mortgage [Member]
Analysis of payment status of loans held for investment [Abstract]
30-59 Days	9,630
60-89 Days	7,383
90 Days or More	62,317
Total Past Due	79,330
Current	1,647,963
Total loans held for investment, net	1,727,293	[2]
Residential mortgage - Home equity [Member]
Analysis of payment status of loans held for investment [Abstract]
30-59 Days	110
60-89 Days	0
90 Days or More	168
Total Past Due	278
Current	31,184
Total loans held for investment, net	31,462	[2]
Consumer loans [Member]
Analysis of payment status of loans held for investment [Abstract]
30-59 Days	0
60-89 Days	0
90 Days or More	0
Total Past Due	0
Current	5,898
Total loans held for investment, net	$ 5,898	[2]

[1] Net of unearned income and deferred expenses, which includes purchase premiums, purchase discounts, and net deferred origination fees and costs

[2] Net of unearned income and deferred expenses.