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Benefit Plans - Schedule of Amortization From Other Accumulated Comprehensive Income into Net Period Benefit Costs (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Aug. 31, 2014
Defined Benefit Plan Disclosure [Line Items] |
Defined benefit plan, health care benefits annual rate of increase in the per capita cost | 6.90%
Defined benefit plan, health care benefits annual rate of increase in the per capita cost trend rate | 4.80%
Qualified Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
Amortization of prior service cost (benefit) | $ 1,648
Amortization of net actuarial loss | 19,604
Non-Qualified Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
Amortization of prior service cost (benefit) | 229
Amortization of net actuarial loss | 1,044
Other Benefits |
Defined Benefit Plan Disclosure [Line Items] |
Amortization of prior service cost (benefit) | (120)
Amortization of net actuarial loss | $ (421)

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- Definition Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position. + References No definition available. + Details
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- Definition Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position. + References No definition available. + Details
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- Definition The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Health Care Cost Trend Rate -URI http://asc.fasb.org/extlink&oid=6514820 + Details
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- Definition The ultimate trend rate for health care costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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