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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Before Tax |  |  |  |
Other comprehensive income (loss), before tax | $ (3,016) | $ 12,989 | $ 27,155 | $ 6,438
Tax Effect |  |  |  |
Other comprehensive income, tax | (1,223) | 5,167 | 10,730 | 2,561
Net of Tax |  |  |  |
Total other comprehensive income (loss), net of tax | (1,793) | 7,822 | 16,425 | 3,877
Net unrealized gains on investment securities |  |  |  |
Before Tax |  |  |  |
Other comprehensive income (loss) before reclassification, before tax | (3,390) | 12,561 | 26,030 | 3,285
Reclassification from AOCI, before tax | 0 | 0 | 0 | 1,866
Other comprehensive income (loss), before tax | (3,390) | 12,561 | 26,030 | 5,151
Tax Effect |  |  |  |
Other comprehensive income (loss) before reclassifications, tax | (1,348) | 4,998 | 10,353 | 1,306
Reclassification from AOCI, tax | 0 | 0 | 0 | 743
Other comprehensive income, tax | (1,348) | 4,998 | 10,353 | 2,049
Net of Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, net of tax | (2,042) | 7,563 | 15,677 | 1,979
Reclassification from AOCI, net of tax | 0 | 0 | 0 | 1,123
Total other comprehensive income (loss), net of tax | (2,042) | 7,563 | 15,677 | 3,102
Net actuarial loss |  |  |  |
Before Tax |  |  |  |
Reclassification from AOCI, before tax | 366 | 419 | 1,099 | 1,260
Tax Effect |  |  |  |
Reclassification from AOCI, tax | 123 | 165 | 371 | 499
Net of Tax |  |  |  |
Reclassification from AOCI, net of tax | 243 | 254 | 728 | 761
Amortization of net transition obligation |  |  |  |
Before Tax |  |  |  |
Reclassification from AOCI, before tax | 4 | 4 | 12 | 12
Tax Effect |  |  |  |
Reclassification from AOCI, tax | 1 | 2 | 3 | 7
Net of Tax |  |  |  |
Reclassification from AOCI, net of tax | 3 | 2 | 9 | 5
Amortization of prior service cost |  |  |  |
Before Tax |  |  |  |
Reclassification from AOCI, before tax | 4 | 5 | 14 | 15
Tax Effect |  |  |  |
Reclassification from AOCI, tax | 1 | 2 | 3 | 6
Net of Tax |  |  |  |
Reclassification from AOCI, net of tax | 3 | 3 | 11 | 9
Defined benefit plans, net |  |  |  |
Before Tax |  |  |  |
Reclassification from AOCI, before tax | 374 | 428 | 1,125 | 1,287
Tax Effect |  |  |  |
Reclassification from AOCI, tax | 125 | 169 | 377 | 512
Net of Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, net of tax | 0 | 0 | 0 | 0
Reclassification from AOCI, net of tax | 249 | 259 | 748 | 775
Total other comprehensive income (loss), net of tax | $ 249 | $ 259 | $ 748 | $ 775

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