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Other Comprehensive Income - Summary of Components of Other Comprehensive Income (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Equity [Abstract] |  |  |  |
Net change in fair value recorded in accumulated OCI, Before-tax | $ (4,006) | $ 12,318 | $ 31,617 | $ (382)
Net change in fair value recorded in accumulated OCI, Tax effect | (1,683) | 5,175 | 13,279 | (159)
Net change in fair value recorded in accumulated OCI, After-tax | (2,323) | 7,143 | 18,338 | (223)
Cumulative-effect adjustment for unrealized gains on securities transferred from available-for-sale to held-to-maturity, Before-tax | 0 | 6,690 | 0 | 6,690
Cumulative-effect adjustment for unrealized gains on securities transferred from available-for-sale to held-to-maturity, Tax effect | 0 | 2,808 | 0 | 2,808
Cumulative-effect adjustment for unrealized gains on securities transferred from available-for-sale to held-to-maturity, After-tax | 0 | 3,882 | 0 | 3,882
Amortization of unrealized (gains)/losses on securities transferred from available-for-sale to held-to-maturity, Before-tax | 297 | (334) | (563) | (334)
Amortization of unrealized (gains)/losses on securities transferred from available-for-sale to held-to-maturity, Tax effect | 125 | (140) | (237) | (140)
Amortization of unrealized (gains)/losses on securities transferred from available-for-sale to held-to-maturity, After-tax | 172 | (194) | (326) | (194)
Net realized (gain)/loss reclassified into earnings, Before-Tax | (548) | 22 | (548) | 22
Net realized (gain)/loss reclassified into earnings, Tax Effect | (230) | 9 | (230) | 9
Net realized (gain)/loss reclassified into earnings, After-Tax | (318) | 13 | (318) | 13
Net change, Before-tax | (4,257) | 18,696 | 30,506 | 5,996
Net change, Tax effect | (1,788) | 7,852 | 12,812 | 2,518
Net change, After-tax | $ (2,469) | $ 10,844 | $ 17,694 | $ 3,478

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
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