GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS, Intangible Assets, by Type (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	$ 78,683	$ 81,450
Accumulated amortization	(23,496)	(22,675)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	65,957	65,957
Accumulated amortization	(16,469)	(13,875)
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	0	2,000
Accumulated amortization	0	(2,000)
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	11,000	11,000
Accumulated amortization	(6,600)	(5,500)
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	0	1,000
Accumulated amortization	0	(1,000)
Mortgage servicing rights
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	1,726	1,493
Accumulated amortization	$ (427)	$ (300)