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Other Retirement Plans | 12 Months Ended
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Sep. 30, 2018
Retirement Benefits [Abstract] |
Other Retirement Plans [Text Block] | OTHER RETIREMENT PLANS Substantially all of our employees are eligible to participate in a qualified defined contribution retirement plan. We also have a non-qualified plan for employees whose incomes exceed qualified plan limits. Retirement and compensation plan costs, including costs related to stock based compensation and the defined contribution retirement plan, charged to continuing operations are $4,430,000 in 2018, $4,396,000 in 2017 and $4,616,000 in 2016. Multiemployer Pension Plans We contribute to three multiemployer defined benefit pension plans under the terms of collective-bargaining agreements ("CBAs"). The risks of participating in these multiemployer plans are different from our company-sponsored plans in the following aspects:
• | We do not manage the plan investments or any other aspect of plan administration;
• | Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers;
• | If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers; and
• | If we choose to stop participating in one or more multiemployer plans, we may be required to fund over time an amount based on the unfunded status of the plan at the time of withdrawal, referred to as "withdrawal liability".
Information related to these plans is outlined in the table below:
(Thousands of Dollars) | Zone Status September 30 | Funding Improvement Plan/Rehabilitation Plan Status | Contributions |  |  |
Pension Plan | 2018 | 2017 | Status | 2018 |  | 2017 |  | 2016 |  | Surcharge Imposed | Expiration Dates of CBAs
GCIU- Employer Retirement Fund 91-6024903/001 | Red | Red | Implemented | 107 |  | 123 |  | 138 |  | No | 3/20/2020
CWA/ITU Negotiated Pension Plan 13-6212879/001 | Red | Red | Implemented | 96 |  | 101 |  | 108 |  | No | 5/12/2019
|  |  |  |  |  |  | 12/31/2018
|  |  |  |  |  |  | 4/1/2019
District No. 9, International Association of Machinists and Aerospace Workers Pension Trust 43-0736847/001 | Green | Green | N/A | 29 |  | 31 |  | 31 |  | N/A | 8/01/2019
Multiemployer plans in red zone status are generally less well funded than plans in green zone status. One of our enterprise's bargaining units withdrew from representation, and as a result we are subject to a claim from the multiemployer pension plan for a withdrawal liability. The amount and timing of such liability will be dependent on actions taken, or not taken, by the Company and the pension plan, as well as the future investment performance and funding status of the pension plan. In 2017, we accrued a liability of $2,600,000 related to this withdrawal. The withdrawal liability determined to be due under this plan will be funded over a period of 20 years.

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- Definition Other Retirement Plans [Text Block]- Note disclosure for retirement plans other than those previously disclosed including defined contribution plans, deferred compensation plans, among others. + References No definition available. + Details
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