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Retirement Plans, Estimated Amounts That Will be Amortized from AOCI Into Net Periodic Benefit Cost, Pension Benefits (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Pension Plan [Member]
Estimated Amounts that will be Amortized from Accumulated Other Comprehensive Income into Net Periodic Benefit Cost [Abstract]
Actuarial gain (loss)	$ 929
Prior service cost (credit)	0
Estimated amounts to be amortized	929
SERP [Member]
Estimated Amounts that will be Amortized from Accumulated Other Comprehensive Income into Net Periodic Benefit Cost [Abstract]
Actuarial gain (loss)	35
Prior service cost (credit)	0
Estimated amounts to be amortized	$ 35

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Amount of cost (credit) included in accumulated other comprehensive (income) loss expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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-Section 50
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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.

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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.

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