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Derivative Financial Instruments (Schedule Of Fair Value Of Derivative Financial Instruments) (Detail) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021
--- | --- | --- | ---
Derivative [Line Items] |  |  |
Derivative Assets | $ 153,534 | $ 165,008 | $ 253,509
Derivative Liabilities | 122,107 | 123,000 | 200,758
Interest rate contract |  |  |
Derivative [Line Items] |  |  |
Derivative Assets | 139,701 | 152,493 | 206,236
Derivative Liabilities | 120,079 | 119,907 | 196,091
Designated as hedging instrument |  |  |
Derivative [Line Items] |  |  |
Derivative Assets | 20,645 | 48,783 | 50,541
Derivative Liabilities | 5,077 | 16,242 | 40,730
Designated as hedging instrument | Interest rate contract | Interest rate derivatives designated as Cash Flow Hedges |  |  |
Derivative [Line Items] |  |  |
Derivative Assets | 13,257 | 47,309 | 50,420
Derivative Liabilities | 3,361 | 10,401 | 31,161
Designated as hedging instrument | Interest rate contract | Interest rate derivatives designated as Fair Value Hedges |  |  |
Derivative [Line Items] |  |  |
Derivative Assets | 7,388 | 1,474 | 121
Derivative Liabilities | 1,716 | 5,841 | 9,569
Not designated as hedging instrument |  |  |
Derivative [Line Items] |  |  |
Derivative Assets | 132,889 | 116,225 | 202,968
Derivative Liabilities | 117,030 | 106,758 | 160,028
Not designated as hedging instrument | Interest rate contract |  |  |
Derivative [Line Items] |  |  |
Derivative Assets | 119,056 | 103,710 | 155,695
Derivative Liabilities | 115,002 | 103,665 | 155,361
Not designated as hedging instrument | Interest rate lock commitments |  |  |
Derivative [Line Items] |  |  |
Derivative Assets | 3,447 | 10,560 | 44,313
Derivative Liabilities | 1,558 | 885 | 1,342
Not designated as hedging instrument | Forward commitments to sell mortgage loans |  |  |
Derivative [Line Items] |  |  |
Derivative Assets | 10,063 | 1,625 | 2,920
Derivative Liabilities | 147 | 1,878 | 3,283
Not designated as hedging instrument | Foreign exchange contracts |  |  |
Derivative [Line Items] |  |  |
Derivative Assets | 323 | 330 | 40
Derivative Liabilities | $ 323 | $ 330 | $ 42

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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
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