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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME |  |  |  |
Net actuarial loss, tax expense (benefit) | $ (310) | $ (2,038) | $ (100) | $ (689)
Pension settlement expense, including termination expense, tax | 651 | 134 | 1,072 | 413
Amortization of unrecognized net periodic benefit costs, tax | 75 | 146 | 252 | 536
Change in unrealized income (loss) on interest rate swap, tax (benefit) | (120) |  | (425) |
Change in unrealized income (loss) on interest rate swap, tax expense |  | 59 |  | 334
Change in foreign currency translation, tax expense (benefit) | $ (12) | $ 45 | $ 108 | $ (58)

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