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Other Comprehensive Income - Summary of Components of OCI (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Equity [Abstract] |  |  |  |
Net change in fair value recorded in accumulated OCI, Before-tax | $ (1,263) | $ 19,564 | $ 35,356 | $ 38,914
Net change in fair value recorded in accumulated OCI, Tax effect | 373 | (5,784) | (10,453) | (11,504)
Net change in fair value recorded in accumulated OCI, After-tax | (890) | 13,780 | 24,903 | 27,410
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity, Before-tax | (17) | (78) | (18) | (1,201)
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity, Tax effect | 5 | 23 | 5 | 355
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity, After-tax | (12) | (55) | (13) | (846)
Net change, Before-tax | (1,280) | 19,486 | 35,338 | 37,713
Net change, Tax effect | 378 | (5,761) | (10,448) | (11,149)
Net change, After-tax | $ (902) | $ 13,725 | $ 24,890 | $ 26,564

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- Definition Amount before tax, after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580 + Details
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