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Consolidated Statements of Income and Comprehensive Income (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Change in net unrealized gain/loss on securities available for sale, tax | $ 8,738 | $ 3,049 | $ 40,456 | $ (35,493)
Change in the non-credit portion of OTTI losses recognized in other comprehensive income, tax | 0 | 0 | (821) | (13)
Change in pension and post-retirement obligations, tax | $ (547) | $ (870) | $ (11,611) | (2,611)
Reclassification adjustment for sales of available-for-sale securities, tax |  |  |  | $ 770

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