CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Net (loss) income	$ (13,510)	$ 77,332	$ 35,175	$ 96,422
Other comprehensive (loss) income:
Foreign currency translation adjustment	(15,538)	5,255	(11,114)	(3,047)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax	0	0	12,331	0
Pension Adjustments	0	46	2,007	(314)
Unrealized (loss) gain on marketable securities	(496)	158	(528)	156
Other Comprehensive Income (Loss), Net of Tax	(16,034)	5,459	2,696	(3,205)
Comprehensive (loss) income	$ (29,544)	$ 82,791	$ 37,871	$ 93,217