Goodwill and Other Intangible Assets (Tables)

9 Months Ended

May 31, 2019

Finite-Lived Intangible Assets [Line Items]

Schedule of Goodwill [Table Text Block]

	Energy		Ag		Corporate and Other		Total
	(Dollars in thousands)
Balances, August 31, 2018	$	552	$	127,338	$	10,574	$	138,464
Goodwill acquired during the period	—		61,358		—		61,358
Balances, May 31, 2019	$	552	$	188,696	$	10,574	$	199,822

Schedule of Intangible Assets and Goodwill [Table Text Block]

	May 31, 2019							August 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
	(Dollars in thousands)
Customer lists	$	84,815	$	(16,054	)	$	68,761	$	40,815	$	(13,082	)	$	27,733
Trademarks and other intangible assets	9,736		(5,393		)	4,343		6,536		(4,931		)	1,605
Total intangible assets	$	94,551	$	(21,447	)	$	73,104	$	47,351	$	(18,013	)	$	29,338

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

	(Dollars in thousands)
Year 1	$	4,540
Year 2	4,487
Year 3	4,187
Year 4	3,944
Year 5	3,940