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Other Comprehensive Income (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Realized gain on sale of investment securities |  |  |  |  |  |  |  |  |  |  |  |  | $ 97 | $ 542 | $ 1,194
Interest income (expense) derivative deposits |  |  |  |  |  |  |  |  |  |  |  |  | (60,210) | (27,286) | (19,248)
Income tax (expense) benefit | $ (13,197) | $ (13,928) | $ (12,528) | $ (12,279) | $ (35,396) | $ (17,409) | $ (17,382) | $ (15,318) | $ (16,429) | $ (15,484) | $ (15,069) | $ (14,413) | (51,932) | (85,504) | (61,395)
Amounts reclassified from accumulated other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  | (490) | (1,323) | 642
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Realized gain on sale of investment securities |  |  |  |  |  |  |  |  |  |  |  |  | 97 | 542 | 1,194
Interest income (expense) derivative deposits |  |  |  |  |  |  |  |  |  |  |  |  | 560 | (1,592) | (1,695)
Interest expense derivative borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (569)
Income tax (expense) benefit |  |  |  |  |  |  |  |  |  |  |  |  | (167) | 399 | 428
Amounts reclassified from accumulated other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  | $ 490 | $ (651) | $ (642)

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- Definition The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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