Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 3,630	$ 4,248
Other comprehensive (loss) income, net of tax:
Unrealized holding (losses) gains on available-for-sale securities arising during the period	(33)	240
Reclassification adjustment for realized gains included in net income		(3)
Other comprehensive (loss) income	(33)	237
Comprehensive income	$ 3,597	$ 4,485