BANK LOANS, NET, Nonperforming Loans Held for Investment and Total Nonperforming Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Jun. 30, 2011		Jun. 30, 2010	Jun. 30, 2011		Jun. 30, 2010	Sep. 30, 2010
Nonaccrual loans:
Total nonaccrual loans	$ 135,669			$ 135,669			$ 147,896
Accruing loans which are 90 days past due:
Total accruing loans which are 90 days past due	4,392			4,392			6,087
Total nonperforming loans	140,061			140,061			153,983
Real estate owned and other repossessed assets, net:
Total real estate owned and other repossessed assets, net	18,821			18,821			27,925
Total nonperforming assets, net	158,882			158,882			181,908
Total nonperforming assets as a % of total loans, net and other real estate owned, net (in hundredths)	2.53%			2.53%			2.97%
Amount excluded from nonperforming assets schedule	11,100			11,100			8,200
Commitments to lend [Abstract]
Commitments to lend additional amounts on nonperforming loan not classified as a troubled debt restructuring	6,200			6,200
Commitments to lend additional amounts on nonperforming loan classified as a troubled debt restructuring							623
Gross interest income related to nonperforming loans	1,700		2,400	4,300		6,300
Interest income recognized on nonperforming loans	279		390	691		916
Commercial loans [Member]
Nonaccrual loans:
Total nonaccrual loans	26,192			26,192			0
CRE loans [Member]
Nonaccrual loans:
Total nonaccrual loans	25,805			25,805			67,071
Accruing loans which are 90 days past due:
Total accruing loans which are 90 days past due	0			0			830
Real estate owned and other repossessed assets, net:
Total real estate owned and other repossessed assets, net	10,256			10,256			19,486
Residential mortgage - First mortgage [Member]
Nonaccrual loans:
Total nonaccrual loans	83,590	[1]		83,590	[1]		80,754	[1]
Nonaccrual loans for which a charge-off had previously been recorded	74,100			74,100			68,700
Accruing loans which are 90 days past due:
Total accruing loans which are 90 days past due	4,306			4,306			5,098
Real estate owned and other repossessed assets, net:
Total real estate owned and other repossessed assets, net	8,552			8,552			8,439
Residential mortgage - Home equity [Member]
Nonaccrual loans:
Total nonaccrual loans	82			82			71
Accruing loans which are 90 days past due:
Total accruing loans which are 90 days past due	86			86			159
Real estate owned and other repossessed assets, net:
Total real estate owned and other repossessed assets, net	$ 13			$ 13			$ 0

[1] Of the total residential first mortgage nonaccrual loans, there are loans totaling $74.1 million and $68.7 million as of June 30, 2011 and September 30, 2010, respectively, for which a charge-off had previously been recorded.