Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 12,031	$ 15,167	$ 10,231
Other comprehensive income, net of tax:
Unrealized holding gains on available-for-sale securities arising during the period	1,559	235	335
Reclassification adjustment for realized gains included in net income	(89)	(217)	(142)
Other comprehensive income	1,470	18	193
Comprehensive income	$ 13,501	$ 15,185	$ 10,424