Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Net (loss) income	$ 18,454	$ 15,049	$ (24,698)
Other comprehensive income (loss):
Defined benefit pension and postretirement plans activity, net of taxes	(2,038)	(711)	(3,664)
Unrealized gains (losses) on available-for-sale securities, net of taxes	(259)	93	34
Foreign currency translation adjustment, net of taxes	774	(3,354)	(2,221)
Comprehensive (loss) income	16,931	11,077	(30,549)
Parent [Member]
Net (loss) income	17,753	14,543	(25,203)
Other comprehensive income (loss):
Defined benefit pension and postretirement plans activity, net of taxes	(2,038)	(711)	(3,664)
Unrealized gains (losses) on available-for-sale securities, net of taxes	(259)	93	34
Foreign currency translation adjustment, net of taxes	772	(2,975)	(2,110)
Comprehensive (loss) income	16,228	10,950	(30,943)
Non-Controlling Interest [Member]
Net (loss) income	701	506	505
Other comprehensive income (loss):
Foreign currency translation adjustment, net of taxes	2	(379)	(111)
Comprehensive (loss) income	$ 703	$ 127	$ 394