Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	$ 2,618	$ 2,475	$ 7,074	$ 6,855
Net Income	(169)	(80)	(508)	(241)
Reclassification out of Accumulated Other Comprehensive Income \| Accretion of Net Retirement Plan Prior Service (Cost) Credit
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other nonoperating income (expense)	(56)	(27)	(169)	(81)
Reclassification out of Accumulated Other Comprehensive Income \| Amortization of Net Retirement Plan Actuarial Gain (Loss)
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other nonoperating income (expense)	(172)	(81)	(514)	(244)
Reclassification out of Accumulated Other Comprehensive Income \| Accumulated Defined Benefit Plans Adjustment
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(228)	(108)	(683)	(325)
Provision for income taxes	59	28	175	84
Net Income	$ (169)	$ (80)	$ (508)	$ (241)

Amount, before tax, of income (loss) attributable to parent. Includes, but is not limited to, income (loss) from continuing operations, discontinued operations and equity method investments.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Amount of income (expense) related to nonoperating activities, classified as other.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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