Pension and Other Post-Retirement Benefits - Narrative (Details) - Pension Plans, Defined Benefit $ in Thousands	Sep. 30, 2020 USD ($)
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]
Remainder of 2020	$ 0
2021	62,600
2022	32,400
2023	25,900
2024	15,700
Thereafter	$ 5,500

Defined Benefit Plan, Estimated Employer Contributions After Year Five

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Defined Benefit Plan, Estimated Future Employer Contributions in Year Five

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- Definition

Defined Benefit Plan, Estimated Future Employer Contributions, Year Four

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- Definition

Defined Benefit Plan, Estimated Future Employer Contributions, Year Three

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Defined Benefit Plan, Estimated Future Employer Contributions, Year Two

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Amount of contributions received and expected to be received by defined benefit plan from employer in current fiscal year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920

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