Income Taxes - Summary of Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands		Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Provision for credit losses		$ 15,477		$ 14,530
Accrued expenses, compensation, and other assets		4,022		5,612
Net operating loss carryforwards	[1]	3,168		3,168
Other investments and investment securities		2,704		2,885
Valuation allowance		(4,228)		(4,418)
Total deferred tax assets		21,143		21,777
Goodwill and other intangibles		42,681	$ 42,800	42,772
Total deferred tax liabilities		42,681		42,772
Deferred tax liability, net		$ 21,538		$ 20,995

[1] As of March 31, 2025, the Company had an estimated $11.1 million of net operating loss carryforwards, $1.7 million of which expires at various dates between December 31, 2026 and December 31, 2035, which had a net carrying value of $0.5 million as of March 31, 2025.