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Premises and Equipment (Narrative) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jan. 01, 2019
Property, Plant and Equipment [Line Items] |  |  |  |  |
Depreciation |  | $ 55,100 | $ 49,900 | $ 41,000 |
Operating Lease, Rent Expense |  | 45,600 | 46,000 | 42,100 |
Operating Lease, Right-of-Use Asset |  | 281,438 | 292,087 |  |
Operating lease, payments |  | 32,100 | 31,600 |  |
Recognition of right of use asset related to the new corporate headquarters facility | $ 121,700 |  |  |  |
Recognition of operating lease liability related to the new corporate headquarters facility | $ 121,700 |  |  |  |
Premises and Equipment |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Operating Lease, Right-of-Use Asset |  | 281,400 | 292,100 |  | $ 170,500
Other Liabilities [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Operating lease, liability |  | 313,404 | 323,000 |  | $ 174,400
Partnership Interest [Member] |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Operating Lease, Rent Expense |  | $ 322 | $ 9,800 | $ 5,900 |

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- Definition Recognition of right of use asset related to the new corporate headquarters facility + References No definition available. + Details
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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