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Other Comprehensive Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Before-Tax Amount |  |  |
Other Comprehensive Income, Net unrealized losses | $ (10,176) | $ (11,647) | $ 1,844
Tax (Expense) Benefit |  |  |
Other Comprehensive Income, Net unrealized losses | 4,068 | 4,657 | (736)
Net of Tax |  |  |
Other comprehensive (loss) income | (6,108) | (6,990) | 1,108
Available-for-sale securities: |  |  |
Before-Tax Amount |  |  |
Change in net unrealized gains (losses) during the period | (7,689) | (8,241) | 19,094
Reclassification adjustment for net realized gain on sale included in available-for-sale securities | (926) | (1,108) | (391)
Other Comprehensive Income, Net unrealized losses | (8,615) | (9,349) | 18,703
Tax (Expense) Benefit |  |  |
Change in net unrealized losses during the period | 3,074 | 3,295 | (7,635)
Reclassification adjustment for net realized gain on sale included in available-for-sale securities | (370) | (443) | (156)
Other Comprehensive Income, Net unrealized losses | 3,444 | 3,738 | (7,479)
Net of Tax |  |  |
Change in net unrealized losses during the period | (4,615) | (4,946) | 11,459
Reclassification adjustment for net realized gain on sale included in available-for-sale securities | (556) | (665) | (235)
Other comprehensive (loss) income | (5,171) | (5,611) | 11,224
Plan actuarial loss |  |  |
Before-Tax Amount |  |  |
Change in net unrealized gains (losses) during the period | (2,787) | 1,846 | (24,211)
Reclassification adjustment for net realized gain on sale included in available-for-sale securities | (1,338) | 2,218 | 1,065
Tax (Expense) Benefit |  |  |
Change in net unrealized losses during the period | 1,114 | (738) | 9,684
Reclassification adjustment for net realized gain on sale included in available-for-sale securities | (535) | 887 | 426
Net of Tax |  |  |
Change in net unrealized losses during the period | (1,673) | 1,108 | (14,527)
Reclassification adjustment for net realized gain on sale included in available-for-sale securities | (803) | 1,331 | 639
Net retirement plan prior service (cost) credit |  |  |
Before-Tax Amount |  |  |
Change in net unrealized gains (losses) during the period | (188) |  | 6,282
Reclassification adjustment for net realized gain on sale included in available-for-sale securities | 76 | (6,362) | 5
Tax (Expense) Benefit |  |  |
Change in net unrealized losses during the period | 75 |  | (2,513)
Reclassification adjustment for net realized gain on sale included in available-for-sale securities | 30 | (2,544) | 2
Net of Tax |  |  |
Change in net unrealized losses during the period | (113) |  | 3,769
Reclassification adjustment for net realized gain on sale included in available-for-sale securities | 46 | (3,818) | 3
Employee benefit plans |  |  |
Before-Tax Amount |  |  |
Other Comprehensive Income, Net unrealized losses | (1,561) | (2,298) | (16,859)
Tax (Expense) Benefit |  |  |
Other Comprehensive Income, Net unrealized losses | 624 | 919 | 6,743
Net of Tax |  |  |
Other comprehensive (loss) income | $ (937) | $ (1,379) | $ (10,116)

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