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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME |  |  |  |
NET INCOME | $ 12,940 | $ 19,154 | $ 17,068 | $ 39,866
Pension and other postretirement benefit plans: |  |  |  |
Net actuarial gain (loss), net of tax of: (2016 – Three-month period $822, Nine-month period $2,637; 2015 – Three-month period $4,317, Nine-month period $3,968) | 1,294 | (6,780) | (4,141) | (6,232)
Pension settlement expense, net of tax of: (2016 – Three-month period $313, Nine-month period $882; 2015 – Three-month period $296, Nine-month period $964) | 490 | 466 | 1,385 | 1,514
Amortization of unrecognized net periodic benefit costs, net of tax of: (2016 – Three-month period $496, Nine month period $1,410 ; 2015 – Three-month period $330, Nine-month period $1,126) |  |  |  |
Net actuarial loss | 807 | 545 | 2,301 | 1,854
Prior service credit | (29) | (29) | (87) | (87)
Interest rate swap and foreign currency translation: |  |  |  |
Change in unrealized income (loss) on interest rate swap, net of tax of: (2016 – Three-month period $168, Nine month period $278; 2015 – Three-month period $312, Nine-month period $389) | 262 | (483) | (430) | (603)
Change in foreign currency translation, net of tax of: (2016 – Three-month period $127, Nine-month period $158; 2015 – Three-month period $225, Nine-month period $351) | (420) | (354) | 29 | (552)
OTHER COMPREHENSIVE INCOME (LOSS), net of tax | 2,404 | (6,635) | (943) | (4,106)
TOTAL COMPREHENSIVE INCOME | $ 15,344 | $ 12,519 | $ 16,125 | $ 35,760

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