CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Net earnings	$ 34,671	$ 10,727
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	1,288	(4,363)
Net unrealized gain (loss) on derivative instruments	17	(133)
Total other comprehensive income (loss), net of tax	1,305	(4,496)
Comprehensive income	$ 35,976	$ 6,231