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Cumulative basis adjustment for fair value hedges (Detail) - Loans and leases - USD ($) $ in Thousands | Mar. 31, 2020 | [1] | Dec. 31, 2019 | [2]
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Carrying Amount of the Hedged Assets | $ 2,081,613 | $ 2,053,483
Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of the Hedged Assets | $ 81,613 | $ 53,483
[1] | These amounts include the amortized cost basis of closed portfolios used to designate hedging relationships in which the hedged item is the last layer expected to be remaining at the end of the hedging relationship. At March 31, 2020, the amortized cost basis of the closed portfolios used in these hedging relationships was $4.3 billion; the cumulative basis adjustments associated with these hedging relationships was $81.6 million; and the amount of the designated hedged items was $2.0 billion.
[2] | These amounts include the amortized cost basis of closed portfolios used to designate hedging relationships in which the hedged item is the last layer expected to be remaining at the end of the hedging relationship. At December 31, 2019, the amortized cost basis of the closed portfolios used in these hedging relationships was $4.5 billion; the cumulative basis adjustments associated with these hedging relationships was $53.5 million; and the amount of the designated hedged items was $2.0 billion.

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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- Definition Aggregate fair value of all derivative assets designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations. + References No definition available. + Details
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