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Revenues from Contracts with Customers (Revenues from Contracts with Customers Disaggregated by Major Business Activity and Primary Geographic Regions) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Commissions | [1] | $ 159,054 | $ 189,239 | $ 541,644 | $ 598,432
Investment banking | [1] | 221,858 | 372,279 | 747,779 | 1,088,010
Revenue from contracts with customers | [1] | 695,034 | 887,096 | 2,295,797 | 2,623,652
Capital Raising [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Investment banking | [1] | 55,122 | 164,061 | 200,091 | 542,645
Advisory [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Investment banking | [1] | 166,736 | 208,218 | 547,688 | 545,365
Asset Management [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 300,557 | 313,862 | 973,457 | 887,878
Interest [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 12,510 | 6,624 | 28,154 | 19,001
Other [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 1,055 | 5,092 | 4,763 | 30,331
Global Wealth Management [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Commissions | [1] | 108,214 | 133,998 | 360,994 | 421,156
Investment banking | [1] | 4,498 | 11,580 | 14,701 | 37,027
Revenue from contracts with customers | [1] | 426,550 | 471,198 | 1,381,447 | 1,393,407
Global Wealth Management [Member] | Capital Raising [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Investment banking | [1] | 4,498 | 11,580 | 14,701 | 37,027
Global Wealth Management [Member] | Advisory [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Investment banking | [1] | 0 | 0 | 0 | 0
Global Wealth Management [Member] | Asset Management [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 300,540 | 313,838 | 973,396 | 887,794
Global Wealth Management [Member] | Interest [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 12,319 | 6,576 | 27,783 | 18,878
Global Wealth Management [Member] | Other [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 979 | 5,206 | 4,573 | 28,552
Institutional Group [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Commissions | [1] | 50,840 | 55,241 | 180,650 | 177,276
Investment banking | [1] | 217,360 | 360,699 | 733,078 | 1,050,983
Revenue from contracts with customers | [1] | 268,408 | 416,012 | 914,160 | 1,228,466
Institutional Group [Member] | Capital Raising [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Investment banking | [1] | 50,624 | 152,481 | 185,390 | 505,618
Institutional Group [Member] | Advisory [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Investment banking | [1] | 166,736 | 208,218 | 547,688 | 545,365
Institutional Group [Member] | Asset Management [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 17 | 24 | 61 | 84
Institutional Group [Member] | Interest [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 191 | (48) | 371 | 123
Institutional Group [Member] | Other [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 0 | 0 | 0 | 0
Other [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 76 | (114) | 190 | 1,779
Other [Member] | Interest [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 0 | 0 | 0 | 0
Other [Member] | Other [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 76 | (114) | 190 | 1,779
United States [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 650,468 | 811,058 | 2,145,641 | 2,459,543
United States [Member] | Global Wealth Management [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 426,550 | 471,198 | 1,381,447 | 1,393,407
United States [Member] | Institutional Group [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 223,842 | 339,974 | 764,004 | 1,064,357
United States [Member] | Other [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 76 | (114) | 190 | 1,779
United Kingdom [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 29,987 | 45,824 | 101,342 | 91,215
United Kingdom [Member] | Institutional Group [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 29,987 | 45,824 | 101,342 | 91,215
Canada [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 7,982 | 21,350 | 25,184 | 51,129
Canada [Member] | Institutional Group [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 7,982 | 21,350 | 25,184 | 51,129
Other [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 6,597 | 8,864 | 23,630 | 21,765
Other [Member] | Institutional Group [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | $ 6,597 | $ 8,864 | $ 23,630 | $ 21,765
[1] | Excludes revenues not derived from contracts with customers included in the Other segment.

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- Definition Amount of commission revenue from buying and selling securities on behalf of customers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 05 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126941114&loc=d3e40544-110947 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(a),(b)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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- Definition Includes (1) underwriting revenue (the spread between the resale price received and the cost of the securities and related expenses) generated through the purchasing, distributing and reselling of new issues of securities (alternatively, could be a secondary offering of a large block of previously issued securities); and (2) fees earned for mergers, acquisitions, divestitures, restructurings, and other types of financial advisory services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(b),(d)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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