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Pension Plans - Qualified Plan - Expected Future Contributions (Details) $ in Millions | Dec. 31, 2018 USD ($)
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Pension Plan [Member] | Qualified Plan [Member] |
Defined Benefit Plan, Expected Future Employer Contributions [Abstract] |
Expected contribution to defined benefit plan | $ 1.5

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition Amount of contributions expected to be received by defined benefit plan from employer in next 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 (g) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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Balance Type: | debit
Period Type: | instant

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- Details
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- Details
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Period Type: |