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Postretirement Benefits (Tables) | 12 Months Ended
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Nov. 30, 2017
Retirement Benefits [Abstract] |
Schedule of Net Benefit Costs | The net periodic benefit cost of our Retirement Plan and DBO Plan consisted of the following (in thousands):
|  | Years Ended November 30,
|  | 2017 |  | 2016 |  | 2015
Interest cost |  | $ | 2,274 |  |  | $ | 2,285 |  |  | $ | 2,270 |
Amortization of prior service cost |  | 1,556 |  |  | 1,556 |  |  | 1,556 |
Service cost |  | 1,046 |  |  | 1,045 |  |  | 1,142 |
Amortization of net actuarial loss |  | 142 |  |  | 79 |  |  | 848 |
Total |  | $ | 5,018 |  |  | $ | 4,965 |  |  | $ | 5,816 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + 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 (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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