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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Abstract] |
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) | ﻿ ﻿
﻿ |  |  |  |  |
﻿ |  |  |  |  |
﻿ | Pre-Tax |  | Tax |  | After-Tax
﻿Three months ended March 31, 2018 |  |  |  |  |
﻿Pension liability activity: |  |  |  |  |
﻿Reclassification adjustment for amortization of net loss (pre-tax other income (expense)) | $ 113 |  | $ 25 |  | $ 88
﻿Postretirement liability activity: |  |  |  |  |
﻿Reclassification adjustment for amortization of net gain (pre-tax other income (expense)) | (70) |  | (15) |  | (55)
﻿Reclassification adjustment for amortization of prior service cost (pre-tax other income (expense)) | 4 |  | 1 |  | 3
﻿ | $ 47 |  | $ 11 |  | $ 36
﻿ ﻿
﻿ |  |  |  |  |
﻿ | Pre-Tax |  | Tax |  | After-Tax
﻿Three months ended March 31, 2017 |  |  |  |  |
﻿Pension liability activity: |  |  |  |  |
﻿Reclassification adjustment for amortization of net loss (pre-tax other income (expense)) | $ 119 |  | $ 42 |  | $ 77
﻿Postretirement liability activity: |  |  |  |  |
﻿Reclassification adjustment for amortization of net gain (pre-tax other income (expense)) | (80) |  | (28) |  | (52)
﻿Reclassification adjustment for amortization of prior service cost (pre-tax other income (expense)) | 4 |  | 1 |  | 3
﻿ | $ 43 |  | $ 15 |  | $ 28
﻿ ﻿ ﻿ ﻿ ﻿ ﻿ ﻿ ﻿ ﻿
Components of Accumulated Other Comprehensive Income Loss |
﻿ |  |  |  |  |
﻿ |  |  | March 31, |  | December 31,
﻿ |  |  | 2018 |  | 2017
﻿Unrecognized pension cost, net of tax of $6,096 and $6,120 |  | $ (9,618) |  | $ (9,707)
﻿Unrecognized postretirement income, net of tax of $519 and $533 |  | 2,087 |  | 2,140
﻿ |  |  | $ (7,531) |  | $ (7,567)
﻿

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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