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Accumulated Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Before-Tax |  |
Net change, other comprehensive income (loss) | $ 37,198 | $ 32,557
Tax Effect |  |
Net change, other comprehensive income (loss) | (11,909) | (7,366)
Net-of-Tax |  |
Net unrealized gains (losses) arising during the period | 26,366 | 26,291
Net realized gains reclassified into net income | (1,077) | (1,100)
Other comprehensive income | 25,289 | 25,191
Available- for-Sale Investment Securities |  |
Before-Tax |  |
Net unrealized gains arising during the period | 40,493 | 30,938
Net realized gains reclassified into net income | (1,529) | (1,561)
Net change, other comprehensive income (loss) | 38,964 | 29,377
Tax Effect |  |
Net unrealized gains (losses) arising during the period | (11,963) | (7,827)
Net realized gains reclassified into net income | 452 | 461
Net change, other comprehensive income (loss) | (11,511) | (7,366)
Net-of-Tax |  |
Net unrealized gains (losses) arising during the period | 28,530 | 23,111
Net realized gains reclassified into net income | (1,077) | (1,100)
Other comprehensive income | 27,453 | 22,011
Foreign Currency Translation Adjustments, Net of Hedges |  |
Before-Tax |  |
Net unrealized gains arising during the period | (1,766) | 3,180
Net change, other comprehensive income (loss) | (1,766) | 3,180
Tax Effect |  |
Net unrealized gains (losses) arising during the period | (398) | 0
Net change, other comprehensive income (loss) | (398) | 0
Net-of-Tax |  |
Net unrealized gains (losses) arising during the period | (2,164) | 3,180
Net realized gains reclassified into net income | 0 | 0
Other comprehensive income | $ (2,164) | $ 3,180

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