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Derivative Financial Instruments - Schedule of Effect of Derivative Instruments on the Consolidated Statements of Income (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (Loss) Recognized in Other Comprehensive Income on Derivative | $ 4,048 | $ 7,803
Gain (Loss) Reclassified from AOCI into Income | 149 | 431
Not Designated as Hedging Instrument |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (Loss) Recognized in Income on Derivative | 3,682 | 4,335
Fair value hedges |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (Loss) Recognized in Income on Derivative | 44,264 |
Gain (Loss) Recognized in Income on Related Hedged Items | (43,966) |
Interest rate swaps on borrowings | Interest income/(expense) | Fair value hedges |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (Loss) Recognized in Income on Derivative | (1,575) | 9,241
Gain (Loss) Recognized in Income on Related Hedged Items | 1,578 | (9,228)
Interest rate swaps on investment securities | Interest income/(expense) | Fair value hedges |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (Loss) Recognized in Income on Derivative | 45,839 |
Gain (Loss) Recognized in Income on Related Hedged Items | (45,544) |
Interest rate contracts | Interest income/(expense) |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (Loss) Recognized in Other Comprehensive Income on Derivative | 4,048 | 7,803
Gain (Loss) Reclassified from AOCI into Income | 149 | 431
Interest rate contracts | Other income/(expense) | Not Designated as Hedging Instrument |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (Loss) Recognized in Income on Derivative | 385 | (466)
Mortgage contracts | Mortgage banking revenue | Not Designated as Hedging Instrument |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (Loss) Recognized in Income on Derivative | 3,261 | 4,820
Foreign currency contracts | Other income/(expense) | Not Designated as Hedging Instrument |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gain (Loss) Recognized in Income on Derivative | $ 36 | $ (19)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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- Definition Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
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- Definition Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121577181&loc=SL110061190-113977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 Reference 4: 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=121641772&loc=d3e637-108580 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 + Details
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