OTHER COMPREHENSIVE INCOME (LOSS)- Total comprehensive income (loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Equity [Abstract]
Net income	$ 10,893	$ 14,464	$ 23,486	$ (8,125)
Other comprehensive income (loss), net of taxes	5,363	3,126	(40,839)	2,628
Comprehensive loss	$ 16,256	$ 17,590	$ (17,353)	$ (5,497)