Pension and Post-Retirement Benefits - Estimated Future Pension and Post-Retirement Benefit Payments (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Pension Benefits
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2020	$ 10,025
2021	9,221
2022	9,195
2023	9,208
2024	9,551
2025-2029	45,386
Post-retirement Benefits \| Before Medicare Subsidy
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2020	1,601
2021	1,669
2022	1,686
2023	1,659
2024	1,677
2025-2029	7,526
Post-retirement Benefits \| After Medicare Subsidy
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2020	1,431
2021	1,502
2022	1,520
2023	1,492
2024	1,513
2025-2029	$ 6,677

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year.

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