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OTHER COMPREHENSIVE INCOME (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Pension and postretirement benefits [Abstract]    
Amortization of net actuarial loss, Gross Amount [1] $ 1,037 $ 1,798
Amortization of net actuarial loss, Income Tax (Provision) Benefit [1] (388) (690)
Amortization of net actuarial loss, Net Amount [1] 649 1,108
Actuarial gains, Gross Amount [1] 0 0
Actuarial gains, Income Tax (Provision) Benefit [1] 0 0
Actuarial gains, Net Amount [1] 0 0
Foreign currency translation adjustments, Gross Amount 0 (97)
Foreign currency translation adjustments, Income Tax (Provision) Benefit 0 0
Foreign currency translation adjustments, Net Amount 0 (97)
Total other comprehensive income, Gross Amount [1] 1,037 1,701
Total other comprehensive income, Income Tax (Provision) Benefit [1] (388) (690)
Total other comprehensive income, net of taxes [1] $ 649 $ 1,011
[1] Actuarial gains (losses) are amortized into costs of sales and operating expenses or selling, general and administrative expenses as appropriate. (See Note 10 - Retirement Plans)