BANK LOANS, NET, Analysis of Payment Status of Loans Held for Investment (Details) (USD $) In Thousands	Sep. 30, 2011		Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2008	Sep. 30, 2007
Analysis of payment status of loans held for investment [Abstract]
30-59 days	$ 6,488
60-89 days	6,318
90 days or more	67,037
Total past due	79,843
Current	6,556,996
Total loans held for investment	6,636,839	[1]	6,275,175	6,743,838	7,224,240	4,722,889
C&I 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	4,100,939
Total loans held for investment	4,100,939	[1]
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	29,087
Total loans held for investment	29,087	[1]
CRE loans [Member]
Analysis of payment status of loans held for investment [Abstract]
30-59 days	0
60-89 days	0
90 days or more	5,053
Total past due	5,053
Current	737,836
Total loans held for investment	742,889	[1]
Residential mortgage - First mortgage [Member]
Analysis of payment status of loans held for investment [Abstract]
30-59 days	6,400
60-89 days	6,318
90 days or more	61,870
Total past due	74,588
Current	1,651,181
Total loans held for investment	1,725,769	[1]
Residential mortgage - Home equity loans/lines [Member]
Analysis of payment status of loans held for investment [Abstract]
30-59 days	88
60-89 days	0
90 days or more	114
Total past due	202
Current	30,515
Total loans held for investment	30,717	[1]
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	7,438
Total loans held for investment	$ 7,438	[1]

[1] Excludes any net unearned income and deferred expenses.