Fair Value Measurements - Summary of Unobservable Inputs (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($) holding	Dec. 31, 2024 USD ($) holding	Apr. 30, 2025 USD ($)
Fair Value, Option, Quantitative Disclosures [Line Items]
Broker dealer deposit program fair value	$ 2,500,000
Re-sign broker dealers
Fair Value, Option, Quantitative Disclosures [Line Items]
Contingent consideration	182	$ 182
Re-sign broker dealers | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Contingent consideration	207	207
Deposit program growth
Fair Value, Option, Quantitative Disclosures [Line Items]
Contingent consideration	12,500	11,568
Change in consideration recognized in earnings	900
Deposit program growth | Subsequent Event
Fair Value, Option, Quantitative Disclosures [Line Items]
Broker dealer deposit program fair value			$ 2,500,000
Deposit program growth | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Contingent consideration	$ 12,500	$ 12,500
Probability of Achievement | Re-sign broker dealers
Fair Value, Option, Quantitative Disclosures [Line Items]
Measurement input | holding	0.990	0.990
Probability of Achievement | Deposit program growth
Fair Value, Option, Quantitative Disclosures [Line Items]
Measurement input | holding	1.000	1.000
Payment Term (in years) | Re-sign broker dealers
Fair Value, Option, Quantitative Disclosures [Line Items]
Payment Term (in years)	7 months 17 days	10 months 17 days
Payment Term (in years) | Deposit program growth
Fair Value, Option, Quantitative Disclosures [Line Items]
Payment Term (in years)	29 days	6 months
Discount Rate | Re-sign broker dealers
Fair Value, Option, Quantitative Disclosures [Line Items]
Measurement input	0.0640	0.0640
Discount Rate | Deposit program growth
Fair Value, Option, Quantitative Disclosures [Line Items]
Measurement input	0.0640	0.0640