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Fair Value Measurements - Summary of Unobservable Inputs (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Apr. 30, 2025 USD ($)	Apr. 22, 2025 USD ($)
Fair Value, Option, Quantitative Disclosures [Line Items]
Payment of contingent consideration		$ 11,447	$ 4,050	$ 0
Re-sign broker dealers
Fair Value, Option, Quantitative Disclosures [Line Items]
Contingent consideration			182
Payment of contingent consideration	$ 200
Re-sign broker dealers | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Contingent consideration		35,000	207
Deposit program growth
Fair Value, Option, Quantitative Disclosures [Line Items]
Contingent consideration			11,568			$ 12,500
Adjustment in fair value		$ 900
New broker dealer deposit programs generated					$ 2,500,000
Deposit program growth | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Contingent consideration			$ 12,500
Probability of Achievement | Re-sign broker dealers
Fair Value, Option, Quantitative Disclosures [Line Items]
Measurement input			0.990
Probability of Achievement | Deposit program growth
Fair Value, Option, Quantitative Disclosures [Line Items]
Measurement input			1.000
Payment Term (in years) | Re-sign broker dealers
Fair Value, Option, Quantitative Disclosures [Line Items]
Payment Term (in years)			10 months 17 days
Payment Term (in years) | Deposit program growth
Fair Value, Option, Quantitative Disclosures [Line Items]
Payment Term (in years)			6 months
Discount Rate | Re-sign broker dealers
Fair Value, Option, Quantitative Disclosures [Line Items]
Measurement input			0.0640
Discount Rate | Deposit program growth
Fair Value, Option, Quantitative Disclosures [Line Items]
Measurement input			0.0640

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Amount of increase (decrease) in value of liability in contingent consideration arrangement in business combination, including, but not limited to, difference arising upon settlement.

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