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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Commissions | [1] | $ 186,681 | $ 195,579 | $ 382,590 | $ 409,193
Investment banking | [1] | 271,075 | 376,443 | 525,921 | 715,731
Revenue from contracts with customers | [1] | 799,285 | 882,534 | 1,600,763 | 1,736,556
Capital Raising [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Investment banking | [1] | 71,519 | 169,778 | 144,969 | 378,584
Advisory [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Investment banking | [1] | 199,556 | 206,665 | 380,952 | 337,147
Asset Management [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 331,264 | 295,869 | 672,900 | 574,016
Interest [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 8,732 | 6,286 | 15,644 | 12,377
Other [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 1,533 | 8,357 | 3,708 | 25,239
Global Wealth Management [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Commissions | [1] | 122,004 | 139,653 | 252,780 | 287,158
Investment banking | [1] | 5,056 | 11,898 | 10,203 | 25,447
Revenue from contracts with customers | [1] | 468,375 | 462,066 | 954,897 | 922,209
Global Wealth Management [Member] | Capital Raising [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Investment banking | [1] | 5,056 | 11,898 | 10,203 | 25,447
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] | 331,243 | 295,847 | 672,856 | 573,956
Global Wealth Management [Member] | Interest [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 8,600 | 6,246 | 15,464 | 12,302
Global Wealth Management [Member] | Other [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 1,472 | 8,422 | 3,594 | 23,346
Institutional Group [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Commissions | [1] | 64,677 | 55,926 | 129,810 | 122,035
Investment banking | [1] | 266,019 | 364,545 | 515,718 | 690,284
Revenue from contracts with customers | [1] | 330,849 | 420,533 | 645,752 | 812,454
Institutional Group [Member] | Capital Raising [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Investment banking | [1] | 66,463 | 157,880 | 134,766 | 353,137
Institutional Group [Member] | Advisory [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Investment banking | [1] | 199,556 | 206,665 | 380,952 | 337,147
Institutional Group [Member] | Asset Management [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 21 | 22 | 44 | 60
Institutional Group [Member] | Interest [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 132 | 40 | 180 | 75
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] | 61 | (65) | 114 | 1,893
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] | 61 | (65) | 114 | 1,893
United States [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 746,001 | 806,496 | 1,495,173 | 1,572,447
United States [Member] | Global Wealth Management [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 468,375 | 462,066 | 954,897 | 922,209
United States [Member] | Institutional Group [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 277,565 | 344,495 | 540,162 | 648,345
United States [Member] | Other [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 61 | (65) | 114 | 1,893
United Kingdom [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 37,047 | 45,824 | 71,355 | 91,215
United Kingdom [Member] | Institutional Group [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 37,047 | 45,824 | 71,355 | 91,215
Canada [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 7,824 | 21,350 | 17,202 | 51,129
Canada [Member] | Institutional Group [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 7,824 | 21,350 | 17,202 | 51,129
Other [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | 8,413 | 8,864 | 17,033 | 21,765
Other [Member] | Institutional Group [Member] |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |
Revenue from contracts with customers | [1] | $ 8,413 | $ 8,864 | $ 17,033 | $ 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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