Related Party Transactions - Summary of Transactions with Related Parties (Detail) $ in Thousands	12 Months Ended
Dec. 31, 2023 USD ($)
Related Party [Member] \| NewSpring Mezzanine Capital IV, LP [Member]
Related Party Transaction [Line Items]
Payments of capital contributions	$ 150
Related Party [Member] \| NewSpring Mezzanine Capital V, LP [Member]
Related Party Transaction [Line Items]
Payments of capital contributions	692
Commitments to Extend Credit [Member]
Related Party Transaction [Line Items]
Amount of transactions with related parties	130
Deposits Received [Member]
Related Party Transaction [Line Items]
Amount of transactions with related parties	$ 801

Cash outflow to owners or shareholders, excluding ordinary dividends. Includes special dividends.

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