Income Taxes (Details Textual) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Feb. 28, 2018	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017	Aug. 31, 2018	Aug. 31, 2017
Income Tax Expense (Benefit)	$ 141,591	$ 571	$ 459	$ 1,317	$ 861
Effective Income Tax Rate Reconciliation, Percent			38.00%		37.90%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			30.20%	21.00%	34.40%		35.00%
Scenario, Plan [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent						21.00%