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Other Comprehensive Income (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
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, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Realized gain on sale of investment securities |  |  |  |  |  |  |  |  |  |  |  |  | $ 542 | $ 1,194 | $ 2,254
Interest expense derivative deposits |  |  |  |  |  |  |  |  |  |  |  |  | (27,286) | (19,248) | (14,343)
Income tax benefit (expense) | $ (35,396) | $ (17,409) | $ (17,382) | $ (15,318) | $ (16,429) | $ (15,484) | $ (15,069) | $ (14,413) | $ (13,485) | $ (13,054) | $ (12,776) | $ (11,734) | (85,504) | (61,395) | (51,049)
Amounts reclassified from accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  | (1,323) | 642 | (1,352)
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Realized gain on sale of investment securities |  |  |  |  |  |  |  |  |  |  |  |  | 542 | 1,194 | 2,254
Interest expense derivative deposits |  |  |  |  |  |  |  |  |  |  |  |  | (1,592) | (1,695) |
Interest expense derivative borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  | (569) |
Income tax benefit (expense) |  |  |  |  |  |  |  |  |  |  |  |  | 399 | 428 | (902)
Amounts reclassified from accumulated other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  | $ (651) | $ (642) | $ 1,352

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition Aggregate amount of interest expense on all borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.7,8) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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