OPERATING SEGMENTS (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended										6 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009	Mar. 31, 2011	Mar. 31, 2010	Jun. 30, 2011	Jun. 30, 2010	Sep. 30, 2012 Segment	Sep. 30, 2011	Sep. 30, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of reportable operating segments																3
Revenues	$ 39,374,000	$ 47,889,000	$ 35,811,000	$ 39,996,000	$ 42,430,000	$ 45,944,000	$ 43,276,000	$ 35,282,000	$ 25,238,000	$ 19,400,000	$ 25,422,000	$ 78,558,000	$ 44,822,000	$ 124,502,000	$ 70,060,000	$ 170,900,000	$ 166,932,000	$ 88,728,000
Net gain on sale of management contracts								5,100,000									5,100,000
Total assets		2,644,263,000			2,636,985,000	2,499,477,000	2,289,368,000	2,143,064,000				2,289,368,000		2,499,477,000		2,644,263,000	2,636,985,000	234,253,000
European Operations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues																0		2,300,000
Total assets		$ 726,000			$ 5,400,000											$ 726,000	$ 5,400,000	$ 7,100,000
RSO [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of Operating Segments																1