ACCUMULATED OTHER COMPREHENSIVE INCOME, After Tax Changes in Each Component (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) as of the beginning of the period	$ (22,795)	$ (1,234)	$ (1,888)	$ 10,726
Other comprehensive income (loss) before reclassifications and taxes	3,039	2,203	5,036	10,432
Amounts reclassified from accumulated other comprehensive loss, before tax	(7,518)	(535)	(7,460)	(4,266)
Pre-tax net other comprehensive (loss) income	(4,479)	1,668	(2,424)	6,166
Income tax effect	3,982	6,484	(18,980)	(9,974)
Net other comprehensive (loss) income for the period, net of tax	(497)	8,152	(21,404)	(3,808)
Accumulated other comprehensive income (loss) as of the end of the period	(23,292)	6,918	(23,292)	6,918
Unrealized gain (loss) on available for sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) as of the beginning of the period	7,058	3,300	4,745	(1,276)
Other comprehensive income (loss) before reclassifications and taxes	(325)	4,174	3,420	15,301
Amounts reclassified from accumulated other comprehensive loss, before tax	(8,432)	(535)	(8,434)	(4,266)
Pre-tax net other comprehensive (loss) income	(8,757)	3,639	(5,014)	11,035
Income tax effect	3,376	(1,393)	1,946	(4,213)
Net other comprehensive (loss) income for the period, net of tax	(5,381)	2,246	(3,068)	6,822
Accumulated other comprehensive income (loss) as of the end of the period	1,677	5,546	1,677	5,546
Net currency translations and net investment hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) as of the beginning of the period	(28,352)	(4,534)	(6,633)	12,002
Other comprehensive income (loss) before reclassifications and taxes	(1,511)	(1,971)	(778)	(4,869)
Amounts reclassified from accumulated other comprehensive loss, before tax	0	0	0	0
Pre-tax net other comprehensive (loss) income	(1,511)	(1,971)	(778)	(4,869)
Income tax effect	2,806	7,877	(19,646)	(5,761)
Net other comprehensive (loss) income for the period, net of tax	1,295	5,906	(20,424)	(10,630)
Accumulated other comprehensive income (loss) as of the end of the period	(27,057)	1,372	(27,057)	1,372
Cash flow hedge
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) as of the beginning of the period	(1,501)	0	0	0
Other comprehensive income (loss) before reclassifications and taxes	4,875	0	2,394	0
Amounts reclassified from accumulated other comprehensive loss, before tax	914	0	974	0
Pre-tax net other comprehensive (loss) income	5,789	0	3,368	0
Income tax effect	(2,200)	0	(1,280)	0
Net other comprehensive (loss) income for the period, net of tax	3,589	0	2,088	0
Accumulated other comprehensive income (loss) as of the end of the period	$ 2,088	$ 0	$ 2,088	$ 0