Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Nov. 30, 2017

Finite-Lived Intangible Assets [Line Items]

Schedule of Goodwill [Table Text Block]

	Energy		Ag			Corporate and Other		Total
	(Dollars in thousands)
Balances, August 31, 2017	$	552	$	142,929		$	10,574	$	154,055
Effect of foreign currency translation adjustments	—		(389		)	—		(389		)
Balances, November 30, 2017	$	552	$	142,540		$	10,574	$	153,666

Schedule of Intangible Assets and Goodwill [Table Text Block]

	November 30, 2017							August 31, 2017
	Carrying Amount		Accumulated Amortization			Net		Carrying Amount		Accumulated Amortization			Net
	(Dollars in thousands)
Customer lists	$	42,391	$	(11,695	)	$	30,696	$	46,180	$	(14,695	)	$	31,485
Trademarks and other intangible assets	6,536		(4,752		)	1,784		23,623		(21,778		)	1,845
Total intangible assets	$	48,927	$	(16,447	)	$	32,480	$	69,803	$	(36,473	)	$	33,330

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

	(Dollars in thousands)
Year 1	$	3,395
Year 2	3,373
Year 3	3,095
Year 4	3,037
Year 5	2,755