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OTHER COMPREHENSIVE INCOME (LOSS) (Tax Effects of Other Comprehensive Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Before Tax Amount |  |  |  |
Total other comprehensive income (loss), net of tax | $ (78) | $ 56,594 | $ (193,429) | $ 270,453
Tax (Expense) Benefit |  |  |  |
Total other comprehensive income (loss), net of tax | 935 | 713 | 6,233 | (6,999)
Net of Tax Amount |  |  |  |
Total other comprehensive income (loss), net of tax | 857 | 57,307 | (187,196) | 263,454
Available for sale investments |  |  |  |
Before Tax Amount |  |  |  |
Unrealized investment gains (losses) arising during the period | (27,968) | 64,431 | (266,117) | 215,360
Adjustment for reclassification of net realized investment (gains) losses and OTTI losses recognized in net income | 26,896 | (15,925) | 79,552 | 8,269
Total other comprehensive income (loss), net of tax | (1,072) | 48,506 | (186,565) | 223,629
Tax (Expense) Benefit |  |  |  |
Unrealized investment gains (losses) arising during the period | 1,907 | (1,926) | 8,596 | (8,899)
Adjustment for reclassification of net realized investment (gains) losses and OTTI losses recognized in net income | (972) | 2,639 | (2,363) | 1,900
Total other comprehensive income (loss), net of tax | 935 | 713 | 6,233 | (6,999)
Net of Tax Amount |  |  |  |
Unrealized investment gains (losses) arising during the period | (26,061) | 62,505 | (257,521) | 206,461
Adjustment for reclassification of net realized investment (gains) losses and OTTI losses recognized in net income | 25,924 | (13,286) | 77,189 | 10,169
Total other comprehensive income (loss), net of tax | (137) | 49,219 | (180,332) | 216,630
Non-credit portion of OTTI losses |  |  |  |
Before Tax Amount |  |  |  |
Total other comprehensive income (loss), net of tax | 0 | 0 | 0 | 0
Tax (Expense) Benefit |  |  |  |
Total other comprehensive income (loss), net of tax | 0 | 0 | 0 | 0
Net of Tax Amount |  |  |  |
Total other comprehensive income (loss), net of tax | 0 | 0 | 0 | 0
Foreign currency translation adjustment |  |  |  |
Before Tax Amount |  |  |  |
Total other comprehensive income (loss), net of tax | 994 | 8,088 | (6,864) | 46,824
Tax (Expense) Benefit |  |  |  |
Total other comprehensive income (loss), net of tax | 0 | 0 | 0 | 0
Net of Tax Amount |  |  |  |
Total other comprehensive income (loss), net of tax | $ 994 | $ 8,088 | $ (6,864) | $ 46,824

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