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PENSION AND OTHER POSTRETIREMENT PLANS (Details 1) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Amounts recognized in accumulated other comprehensive income |  |
Net amount recognized | $ (5,533) | $ (4,741)
Pension Benefits |  |
Amounts recognized in accumulated other comprehensive income |  |
Net actuarial loss | 6,987 | 7,874
Prior service cost | (639) | (715)
Transition obligation | 0 | 0
Net amount recognized | 6,348 | 7,159
SERP Benefits |  |
Amounts recognized in accumulated other comprehensive income |  |
Net actuarial loss | 1,459 | 800
Prior service cost | 0 | 0
Transition obligation | 5 | 32
Net amount recognized | $ 1,464 | $ 832

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- Definition Amount, after tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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