New Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Feb. 29, 2016	Feb. 28, 2017	Aug. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Non current deferred tax liabilities	$ 1,020	$ 1,678	$ 1,223
New Accounting Pronouncement, Early Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to net non-current deferred tax assets	1,800		3,300
Non current deferred tax liabilities	12,200		$ 12,000
Increase in operating activities and decrease from financing activities	$ 100