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Composition of Certain Financial Statement Captions - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Items Included in Consolidated Statement of Financial Condition [Abstract]
Depreciation	$ 8,341,000	$ 9,197,000	$ 25,097,000	$ 26,509,000
Deferred contract costs	42,527,000		42,527,000		$ 40,221,000
Capitalized contract cost, amount capitalized during period	$ 5,326,000	$ 2,243,000	10,237,000	7,212,000
Amortization of deferred contract costs			7,931,000	$ 6,622,000
Capitalized contract cost impairment			$ 0

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- Definition

Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 340
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479483/340-40-50-3

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Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 340
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479483/340-40-50-3

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Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

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-SubTopic 40
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-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
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The expense recognized in the current period that allocates the cost of nonproduction tangible assets over their useful lives.

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