Income Taxes - Summary of Components of Deferred and Other Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Goodwill and other intangibles		$ 42,943	$ 43,034
Provision for credit losses		(12,005)	(13,032)
Net operating loss carryforwards	[1]	(3,803)	(3,802)
Accrued expenses, compensation, and other assets		(4,794)	(6,976)
Unrealized gains on other investments		(868)	(1,877)
Total deferred tax liability		21,473	17,347
Valuation allowance		3,373	3,860
Deferred tax liability, net		$ 24,846	$ 21,207

[1] As of March 31, 2024, 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 $1.2 million as of March 31, 2024.