Investments (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Schedule of sales available-for-sale securities
Proceeds from sales	$ 649	$ 23,247	$ 35,203	$ 47,827
Gross realized gains	3	171	174	384
Gross realized losses	$ (1)		$ (2)	$ (4)