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Retirement Plans - Amounts Expected to be Recognized as Components of Net Periodic Pension Costs (Details) $ in Thousands | Dec. 31, 2017 USD ($)
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Pension plan |
Amounts expected to be recognized as component of net periodic pension costs during the next fiscal year: |
Amortization net actuarial gain or (loss) | $ 64
Amortization prior service cost | 0
SERP |
Amounts expected to be recognized as component of net periodic pension costs during the next fiscal year: |
Amortization net actuarial gain or (loss) | $ 63

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- Definition Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position. + 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 (s) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position. + 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 (s) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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