Fair Value Measurements (Schedule of Reconciliation of Items Measured at Fair Value on a Recurring Basis That Used Significant Unobservable Inputs (Level 3)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	$ 4,048	$ 13,193	$ 4,750	$ 13,010
Total gains (losses) realized or unrealized: Included in other comprehensive income	0	914	(102)	1,097
Settlements	0	(5,000)	(600)	(5,000)
Balance, end of period	4,048	9,107	4,048	9,107
Unrealized gains (losses) attributable to assets still held as of end of period	$ 0	$ 914	$ (102)	$ 1,097