TRADING INSTRUMENTS AND TRADING INSTRUMENTS SOLD BUT NOT YET PURCHASED (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Trading Securities [Abstract]
Total debt securities	$ 581,837	$ 602,973
Derivative contracts	42,086	28,205
Equity securities	28,344	34,142
Corporate loans	4,814	990
Other	33,470	13,083
Trading instruments	690,551	679,393
Financial Instruments Sold, Not yet Purchased, at Fair Value [Abstract]
Total debt securities	262,162	215,142
Derivative liability	20,239	12,372
Equity securities	3,098	10,886
Corporate loans	0	0
Other securities	2,494	0
Instruments sold but not yet purchased	287,993	238,400
Municipal and provincial obligations
Trading Securities [Abstract]
Total debt securities	206,063	203,889
Financial Instruments Sold, Not yet Purchased, at Fair Value [Abstract]
Total debt securities	18,313	11,647
Corporate obligations
Trading Securities [Abstract]
Total debt securities	95,317	111,928
Financial Instruments Sold, Not yet Purchased, at Fair Value [Abstract]
Total debt securities	33,184	15,333
Government and agency obligations
Trading Securities [Abstract]
Total debt securities	115,947	101,362
Financial Instruments Sold, Not yet Purchased, at Fair Value [Abstract]
Total debt securities	205,658	187,424
Agency MBS and CMOs
Trading Securities [Abstract]
Total debt securities	117,570	127,419
Financial Instruments Sold, Not yet Purchased, at Fair Value [Abstract]
Total debt securities	5,007	738
Non-agency CMOs and ABS
Trading Securities [Abstract]
Total debt securities	46,940	58,375
Financial Instruments Sold, Not yet Purchased, at Fair Value [Abstract]
Total debt securities	0	0
Brokered certificates of deposit
Trading Securities [Abstract]
Other	$ 30,800	$ 10,200