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Composition of Certain Financial Statement Captions (Receivables) (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Items Included in Consolidated Statement of Financial Condition [Abstract] |  |
Trade receivables | $ 102,590 | $ 110,722
Fees earned, not billed | 343,823 | 320,700
Other receivables | 12,534 | 26,563
Gross receivables | 458,947 | 457,985
Less: Allowance for doubtful accounts | (721) | (901)
Receivables, net | $ 458,226 | $ 457,084

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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4531-111522 + Details
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