Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income		$ 2,357	$ 6,450
Other comprehensive loss, net of tax:
Foreign currency translation adjustment		(3,755)	(1,867)
Change in net unrealized loss on investments		(24)	(63)
Less income tax benefit		9	23
Reclassification of realized gain on investments included in net income (1)	[1]	0	(7)
Less income tax benefit (2)	[2]	0	3
Other comprehensive loss, net of tax		(3,770)	(1,911)
Comprehensive (loss) income		$ (1,413)	$ 4,539

[1] Recorded in Other income, net on our Condensed Consolidated Statements of Operations.

[2] Recorded in Income tax provision in our Condensed Consolidated Statements of Operations.