Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Schedule of Assets Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Level 3)
Beginning Balance	$ 24	$ 773
Transfers into Level 3		31
Transfers out of Level 3	(24)	(763)
Total realized and unrealized gains (losses):
Included in other comprehensive income (loss)		13
Purchases		620
Issuances
Sales		(650)
Settlements
Ending Balance		24
Mortgage-backed securities [Member]
Schedule of Assets Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Level 3)
Beginning Balance	15	69
Transfers into Level 3		17
Transfers out of Level 3	(15)	(68)
Total realized and unrealized gains (losses):
Included in other comprehensive income (loss)		(3)
Purchases		620
Issuances
Sales		(620)
Settlements
Ending Balance		15
Asset-backed securities [Member]
Schedule of Assets Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Level 3)
Beginning Balance	9
Transfers into Level 3		14
Transfers out of Level 3	(9)
Total realized and unrealized gains (losses):
Included in other comprehensive income (loss)		(3)
Purchases
Issuances
Sales		(2)
Settlements
Ending Balance		9
U.S. Government Obligations [Member]
Schedule of Assets Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Level 3)
Beginning Balance		704
Transfers out of Level 3		(695)
Total realized and unrealized gains (losses):
Included in other comprehensive income (loss)		19
Issuances
Sales		(28)
Settlements
Ending Balance