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Summary of Significant Accounting Policies - Revenue - Contract Fulfillment Costs (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Intake Costs asset |  |
Capitalized Contract Cost [Line Items] |  |
GROSS CARRYING AMOUNT | $ 76,150 | $ 68,345
ACCUMULATED AMORTIZATION | (39,617) | (42,132)
NET CARRYING AMOUNT | 36,533 | 26,213
Commissions asset |  |
Capitalized Contract Cost [Line Items] |  |
GROSS CARRYING AMOUNT | 156,639 | 133,145
ACCUMULATED AMORTIZATION | (64,279) | (58,949)
NET CARRYING AMOUNT | $ 92,360 | $ 74,196

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- Definition Amount, before accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479483/340-40-50-3 + Details
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