CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Net earnings	$ 11,157	$ 8,610	$ 21,884	$ 17,439
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	2,548	1,338	(1,815)	200
Net unrealized gain (loss) on derivative instruments	29	18	(103)	82
Total other comprehensive income (loss), net of tax	2,577	1,356	(1,918)	282
Comprehensive income	$ 13,734	$ 9,966	$ 19,966	$ 17,721