Stockholders' Equity (SARs Activity) (Details) - SARs - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Aug. 31, 2019	Aug. 31, 2018
SARS Outstanding
SARS Outstanding as of beginning of period (in shares)	156,801
SARS exercised (in shares)	(33,300)
SARS Outstanding as of end of period (in shares)	123,501	156,801
Aggregate Intrinsic Value, Outstanding	$ 1,278	$ 1,748
Weighted- Average Exercise Price
Weighted-Average Exercise Price, Outstanding as of beginning of period (in dollars per share)	$ 18.41
Weighted-Average Exercise Price, SARS exercised (in dollars per share)	18.24
Weighted-Average Exercise Price, Outstanding as of end of period (in dollars per share)	$ 18.46	$ 18.41
Weighted- Average Remaining Contractual Life, Outstanding	2 years 1 month 10 days	3 years 1 month 6 days