Description Of Business And Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Aug. 31, 2013 segment
Description Of Business And Significant Accounting Policies [Line Items]
Number of reportable segments	2
Leased Barriers [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	12 years
Maximum [Member] | Leased Barrier Transfer Machines [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	10 years
Maximum [Member] | Building [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	30 years
Maximum [Member] | Equipment [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	7 years
Maximum [Member] | Other [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	20 years
Minimum [Member] | Leased Barrier Transfer Machines [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	8 years
Minimum [Member] | Building [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	15 years
Minimum [Member] | Equipment [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	3 years
Minimum [Member] | Other [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Useful life	2 years