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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, 2017
Trading Securities Balance Sheet Reported Amounts [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, 2017 and December 31, 2016 are as follows (in thousands):
|  | March, 31, 2017 |  |  | December 31, 2016 |
Financial instruments owned: |  |  |  |  |  |  |  |
U.S. government securities |  | $ | 19,784 |  |  | $ | 9,951 |
U.S. government agency securities |  |  | 170,659 |  |  |  | 89,833 |
Mortgage-backed securities: |  |  |  |  |  |  |  |
Agency |  |  | 293,654 |  |  |  | 305,774 |
Non-agency |  |  | 28,595 |  |  |  | 28,402 |
Corporate securities: |  |  |  |  |  |  |  |
Fixed income securities |  |  | 356,364 |  |  |  | 299,946 |
Equity securities |  |  | 39,791 |  |  |  | 32,044 |
State and municipal securities |  |  | 149,242 |  |  |  | 159,095 |
|  | $ | 1,058,089 |  |  | $ | 925,045 |
Financial instruments sold, but not yet purchased: |  |  |  |  |  |  |  |
U.S. government securities |  | $ | 351,765 |  |  | $ | 362,536 |
U.S. government agency securities |  |  | — |  |  |  | 20,549 |
Mortgage-backed securities: |  |  |  |  |  |  |  |
Agency |  |  | 96,975 |  |  |  | 94,552 |
Non-agency |  |  | — |  |  |  | 1 |
Corporate securities: |  |  |  |  |  |  |  |
Fixed income securities |  |  | 260,410 |  |  |  | 202,968 |
Equity securities |  |  | 45,308 |  |  |  | 18,395 |
State and municipal securities |  |  | — |  |  |  | 31 |
|  | $ | 754,458 |  |  | $ | 699,032 |

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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://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 + Details
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