Commitments and Contingencies (Tables)

12 Months Ended

Aug. 31, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum rental payments for operating leases



	Rail Cars		Vehicles		Equipment and Other		Total
	(Dollars in thousands)
2014	$	18,875	$	13,006	$	45,965	$	77,846
2015	18,331		9,803		35,934		64,068
2016	17,310		6,959		29,699		53,968
2017	16,203		4,451		21,906		42,560
2018	11,608		2,480		13,527		27,615
Thereafter	10,830		685		32,210		43,725
Total minimum future lease payments	$	93,157	$	37,384	$	179,241	$	309,782

Unrecorded unconditional purchase obligations disclosure

Minimum future payments required under noncancelable purchase obligations as of August 31, 2013 are as follows:



	Payments Due by Period
	Total		Less than 1 Year		1 - 3 Years		3 - 5 Years		More than 5 Years
	(Dollars in thousands)
Long-term unconditional purchase obligations	$	510,705	$	63,387	$	137,237	$	89,700	$	220,381
Other contractual obligations	4,871,767		4,713,927		80,454		10,459		66,927
Total purchase obligations	$	5,382,472	$	4,777,314	$	217,691	$	100,159	$	287,308

- Definition

Tabular disclosure of unconditional purchase obligations that are not recognized as a liability on the balance sheet, including the nature and significant terms of an unconditional purchase obligation; the amount of the fixed and determinable portion of the obligation as of the date of the latest balance sheet presented in the aggregate and, if determinable, for each of the five succeeding fiscal years; the nature of any variable components of the obligation; the amount purchased under the obligation (for example, the take-or-pay or throughput contract) for the reporting period; and may include the amount of imputed interest necessary to reduce the obligation to present value.

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