Acquisitions Acquisitions - Pro Forma Results of Operations (Tables) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Business Combinations [Abstract]
Document Period End Date			Feb. 28, 2017
Net sales
Net sales, As reported	$ 258,869	$ 263,289	$ 524,662	$ 568,300
Net sales, Pro forma	258,869	275,115	524,662	591,009
Net earnings (loss)
Net earnings (loss), As reported	5,074	(159,190)	10,039	(143,742)
Net earnings (loss), Pro forma	$ 5,074	$ (157,038)	$ 10,039	$ (140,198)
Basic earnings (loss) per share
Basic earning (loss) per share, As reported	$ 0.09	$ (2.70)	$ 0.17	$ (2.43)
Basic earnings (loss) per share, Pro forma	0.09	(2.66)	0.17	(2.37)
Diluted earnings (loss) per share
Diluted earnings (loss) per share, As reported	0.08	(2.70)	0.17	(2.43)
Diluted earnings (loss) per share, Pro forma	$ 0.08	$ (2.66)	$ 0.17	$ (2.37)