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Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Tables) | 3 Months Ended
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Mar. 31, 2019
Investments Debt And Equity Securities [Abstract] |
Components Of Trading Securities Owned And Trading Securities Sold, But Not Yet Purchased | The components of financial instruments owned and financial instruments sold, but not yet purchased, at March 31, 2019 and December 31, 2018 are as follows (in thousands):
|  | March 31, 2019 |  |  | December 31, 2018 |
Financial instruments owned: |  |  |  |  |  |  |  |
U.S. government securities |  | $ | 27,326 |  |  | $ | 42,121 |
U.S. government agency securities |  |  | 117,701 |  |  |  | 72,532 |
Mortgage-backed securities: |  |  |  |  |  |  |  |
Agency |  |  | 514,718 |  |  |  | 564,111 |
Non-agency |  |  | 8,159 |  |  |  | 25,727 |
Asset-backed securities |  |  | 56,514 |  |  |  | 25,905 |
Corporate securities: |  |  |  |  |  |  |  |
Fixed income securities |  |  | 336,317 |  |  |  | 310,457 |
Equity securities |  |  | 54,779 |  |  |  | 57,911 |
Sovereign debt |  |  | 2,351 |  |  |  | 14,063 |
State and municipal securities |  |  | 179,626 |  |  |  | 154,622 |
|  | $ | 1,297,491 |  |  | $ | 1,267,449 |
Financial instruments sold, but not yet purchased: |  |  |  |  |  |  |  |
U.S. government securities |  | $ | 548,357 |  |  | $ | 534,817 |
U.S. government agency securities |  |  | 49 |  |  |  | 32,755 |
Mortgage-backed securities: |  |  |  |  |  |  |  |
Agency |  |  | 180,287 |  |  |  | 123,456 |
Corporate securities: |  |  |  |  |  |  |  |
Fixed income securities |  |  | 195,642 |  |  |  | 208,725 |
Equity securities |  |  | 53,182 |  |  |  | 36,117 |
Sovereign debt |  |  | 1,599 |  |  |  | 11,429 |
State and municipal securities |  |  | — |  |  |  | 7 |
|  | $ | 979,116 |  |  | $ | 947,306 |

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- Definition Tabular disclosure of financial instruments held by a broker-dealer for its own account (proprietary securities) for trading or investment purposes that are carried at fair value including securities sold, not yet purchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969 + Details
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