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Pension and Other Postretirement Benefits - Benefits Expected to be Paid in Subsequent Years from Our Pension and Other Postretirement as Well as Medicare Subsidy Receipts (Details) $ in Thousands | Dec. 31, 2017 USD ($)
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Pension Benefits [Member] |
Pension And Other Employee Benefit Plans [Line Items] |
2018 | $ 16,562
2019 | 16,923
2020 | 17,937
2021 | 17,688
2022 | 15,787
2023-2027 | 83,382
Total | 168,279
Other Benefits [Member] |
Pension And Other Employee Benefit Plans [Line Items] |
2018 | 1,580
2019 | 1,568
2020 | 1,562
2021 | 1,557
2022 | 1,553
2023-2027 | 7,753
Total | $ 15,573

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- Definition Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year. + 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 (f) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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