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OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Pension and postretirement benefits [Abstract] |  |  |
Amortization of net actuarial loss, Gross Amount | [1] | $ 568 | $ 1,209
Amortization of net actuarial loss, Income Tax (Provision) Benefit | [1] | (138) | (463)
Amortization of net actuarial loss, Net Amount | [1] | 430 | 746
Foreign currency translation, Gross Amount |  | 420 | 0
Foreign currency translation, Income Tax (Provision) Benefit |  | 0 | 0
Foreign currency translation, Net Amount |  | 420 | 0
Total other comprehensive income (loss), Gross Amount |  | 988 | 1,209
Total other comprehensive income (loss), Income Tax (Provision) Benefit |  | (8,063) | (463)
Total other comprehensive income (loss), net of taxes |  | (7,075) | 746
ASU 2018-02 [Member] |  |  |
Pension and postretirement benefits [Abstract] |  |  |
Adoption of ASU 2018-02 - reclassification to retained earnings, Gross Amount |  | 0 | 0
Adoption of ASU 2018-02 - reclassification to retained earnings, Income Tax (Provision) Benefit |  | (7,925) | 0
Adoption of ASU 2018-02 - reclassification to retained earnings, Net Amount |  | $ (7,925) | $ 0
[1] | Actuarial losses are amortized into other income (expense). (See Note 13 - Retirement Plans)

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- Definition Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e689-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 + Details
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- Definition Amount, after tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e689-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 + Details
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