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Revenue Recognition (Schedule of Disaggregation of Revenue by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	$ 119,636		$ 337,959
Lease revenue	1,418		4,228
Operating revenues	121,054	$ 169,571	342,187	$ 424,436
Irrigation [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	98,618		281,994
Lease revenue	0		0
Operating revenues	98,618	128,421	281,994	343,639
Infrastructure [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	21,018		55,965
Lease revenue	1,418		4,228
Operating revenues	22,436	$ 41,150	60,193	$ 80,797
Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	108,871		308,059
Point in Time [Member] | Irrigation [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	89,442		256,466
Point in Time [Member] | Infrastructure [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	19,429		51,593
Over Time [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	10,765		29,900
Over Time [Member] | Irrigation [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	9,176		25,528
Over Time [Member] | Infrastructure [Member]
Disaggregation Of Revenue [Line Items]
Revenue from the contracts with customers	$ 1,589		$ 4,372

X

- Definition

Amount of direct financing lease revenue.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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