Receivables (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2011	Jun. 30, 2011
Receivables [Abstract]
Allowance for doubtful accounts as a percentage of notes receivable	7.00%	6.00%
Current notes receivable, non-accrual status	$ 1.0
Long-term notes receivable, non-accrual status	$ 0.4
Percentage of notes receivable that are classified as current	99.00%
Charge-offs as a percentage of notes receivable	0.20%
Notes receivable, number of days past due	60