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AOCI (Tables) | 12 Months Ended
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Dec. 31, 2017
Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Components of accumulated other comprehensive income |
| Foreign Currency Derivative Activities(A) |  | Post Retirement Benefit Plan Items(B) |  | Total
2016: |  |  |  |  |
Balance at January 1, 2016 | $ | — |  |  | $ | 2,645,000 |  |  | $ | 2,645,000 |
Other comprehensive income before reclassifications | (289,000 | ) |  | 319,000 |  |  | 30,000 |
Amounts reclassified from accumulated other comprehensive income | (14,000 | ) |  | (336,000 | ) |  | (350,000 | )
Income tax (expense) benefit | 103,000 |  |  | (14,000 | ) |  | 89,000 |
Balance at December 31, 2016 | $ | (200,000 | ) |  | $ | 2,614,000 |  |  | $ | 2,414,000 |
2017: |  |  |  |  |
Balance at January 1, 2017 | $ | (200,000 | ) |  | $ | 2,614,000 |  |  | $ | 2,414,000 |
Other comprehensive income before reclassifications | 517,000 |  |  | (417,000 | ) |  | 100,000 |
Amounts reclassified from accumulated other comprehensive income | (512,000 | ) |  | (347,000 | ) |  | (859,000 | )
Income tax (expense) benefit | (2,000 | ) |  | 255,000 |  |  | 253,000 |
Adoption of Accounting Standards Update 2018-02 | — |  |  | 162,000 |  |  | 162,000 |
Balance at December 31, 2017 | $ | (197,000 | ) |  | $ | 2,267,000 |  |  | $ | 2,070,000 |

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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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