Earnings Per Share (Details) - shares	3 Months Ended
	Nov. 30, 2015	Nov. 30, 2014
Weighted-average shares outstanding:
Basic	29,223,000	29,017,000
Diluted	29,462,000	29,468,000
Equity Award [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	8,661	0
Weighted-average shares outstanding:
Incremental shares from dilutive securities	239,000	451,000
Convertible special stock, no par value [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	2,388,913
Weighted-average shares outstanding:
Incremental shares from dilutive securities	0	0