UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 18,702	$ 9,886	$ 39,142	$ 43,613
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	3,795	(228)	10,152	(8,512)
Minimum pension liability adjustment	0	0	287	0
Net unrealized gain (loss) on cash flow hedges	(173)	262	(265)	(350)
Other comprehensive income (loss), net of tax	3,622	34	10,174	(8,862)
Comprehensive income	$ 22,324	$ 9,920	$ 49,316	$ 34,751