Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Consolidated Statement of Comprehensive Income (Loss) [Abstract]
Net income	$ 2,947	$ 9,305	$ 26,794	$ 23,508
Foreign currency translation adjustment	2,711	(1,801)	(325)	(3,672)
Comprehensive income	$ 5,658	$ 7,504	$ 26,469	$ 19,836