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Other Comprehensive Income (Loss) - Reclassification Out of AOCI (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Before-Tax Amount |  |
Net unrealized gains/losses | $ 16,181 | $ (19,054)
Tax (Expense) Benefit |  |
Net unrealized gains/losses | (3,966) | 4,668
Net of Tax |  |
Other comprehensive income (loss) | 12,215 | (14,386)
Net unrealized gains/losses |  |
Before-Tax Amount |  |
Change in net unrealized gain/loss during the period | 15,756 | (19,351)
Reclassification adjustment for net realized gain on sale of available-for-sale securities included in net income | 0 | (124)
Net unrealized gains/losses | 15,756 | (19,475)
Tax (Expense) Benefit |  |
Change in net unrealized gain/loss during the period | (3,862) | 4,741
Reclassification adjustment for net realized gain on sale included in available-for-sale securities | 0 | 30
Net unrealized gains/losses | (3,862) | 4,771
Net of Tax |  |
Change in net unrealized gain/loss during the period | 11,894 | (14,610)
Net of tax | 0 | (94)
Other comprehensive income (loss) | 11,894 | (14,704)
Amortization of net retirement plan actuarial gain |  |
Before-Tax Amount |  |
Reclassification adjustment for net realized gain on sale of available-for-sale securities included in net income | 421 | 417
Tax (Expense) Benefit |  |
Reclassification adjustment for net realized gain on sale included in available-for-sale securities | (103) | (102)
Net of Tax |  |
Net of tax | 318 | 315
Amortization of net retirement plan prior service cost |  |
Before-Tax Amount |  |
Reclassification adjustment for net realized gain on sale of available-for-sale securities included in net income | 4 | 4
Tax (Expense) Benefit |  |
Reclassification adjustment for net realized gain on sale included in available-for-sale securities | (1) | (1)
Net of Tax |  |
Net of tax | 3 | 3
Employee benefit plans |  |
Before-Tax Amount |  |
Net unrealized gains/losses | 425 | 421
Tax (Expense) Benefit |  |
Net unrealized gains/losses | (104) | (103)
Net of Tax |  |
Other comprehensive income (loss) | $ 321 | $ 318

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