CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Net earnings	$ 8,610	$ 7,610	$ 17,439	$ 17,633
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	1,338	(3,462)	200	(5,925)
Net unrealized gain (loss) on derivative instruments	18	(229)	82	(229)
Total other comprehensive income (loss), net of tax	1,356	(3,691)	282	(6,154)
Comprehensive income	$ 9,966	$ 3,919	$ 17,721	$ 11,479