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Derivative Instruments and Hedging Activities - Effect of Derivative Financial Instruments on Net Income and Comprehensive Income (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain (Loss) Recognized in OCI on Derivatives | $ 9,113 | $ (20,346)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income | (25,926) | (1,478)
Other non-interest income | Interest Rate Swap |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain (Loss) Recognized in OCI on Derivatives | 0 | 0
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income | (24,467) | 0
Interest expense | Interest Rate Swap |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain (Loss) Recognized in OCI on Derivatives | 9,113 | (20,346)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income | (1,459) | (1,478)
Derivative Designated as Hedging Instrument | Fair Value Hedging |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Income (Loss) Recognized in Earnings | 0 | 0
Derivative Designated as Hedging Instrument | Net interest income | Interest Rate Swap | Fair Value Hedging |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Income (Loss) Recognized in Earnings | 4,907 | 0
Derivative Designated as Hedging Instrument | Net interest income | Available-for-sale Securities | Fair Value Hedging |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Income (Loss) Recognized in Earnings | (4,907) | 0
Not Designated as Hedging Instrument |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Income (Loss) Recognized in Earnings | 2,532 | (1,010)
Not Designated as Hedging Instrument | Other non-interest income | Interest Rate Swap |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Income (Loss) Recognized in Earnings | 2,399 | (1,015)
Not Designated as Hedging Instrument | Other non-interest income | Interest Rate Cap |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Income (Loss) Recognized in Earnings | 0 | 0
Not Designated as Hedging Instrument | Other non-interest income | Credit Contract |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Income (Loss) Recognized in Earnings | 137 | (132)
Not Designated as Hedging Instrument | Mortgage banking income | Residential Mortgage Loan Commitments |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Income (Loss) Recognized in Earnings | $ (4) | $ 137

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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 Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as 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 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121641772&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 11 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580 + Details
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- Definition Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as 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 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e689-108580 Reference 2: 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 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
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