Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 3,614us-gaap_NetIncomeLoss	$ 3,630us-gaap_NetIncomeLoss
Other comprehensive loss, net of tax:
Unrealized holding losses on available-for-sale securities arising during the period	(1,089)	(33)
Reclassification adjustment for realized losses included in net income	7
Other comprehensive loss	(1,082)	(33)
Comprehensive income	$ 2,532us-gaap_ComprehensiveIncomeNetOfTax	$ 3,597us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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