CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Net income	$ 24,176	$ 22,013
Other comprehensive income (loss):
Change in unrealized gains on available-for-sale securities (net of tax)		(6)
Foreign currency translation adjustments	(97)	304
Other comprehensive income (loss)	(97)	298
Total comprehensive income	$ 24,079	$ 22,311