Fair Value of Financial Instruments - Summary of Carrying Values and Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Financial assets
Equity investments		$ 16,374	$ 11,430
Investment securities		53,038	54,282
Loans receivable		2,228,426	2,215,886	$ 1,984,180
Equity securities, fair value		1,700	1,700
Carrying Amount [Member]
Financial assets
Cash, cash equivalents, and federal funds sold	[1]	169,125	149,845
Equity investments		16,374	11,430
Investment securities		53,038	54,282
Loans receivable		2,144,599	2,131,651
Accrued interest receivable	[2]	12,673	13,538
Equity securities, fair value	[3]	1,730	1,748
Financial liabilities
Funds borrowed		2,145,596	2,118,689
Accrued interest payable	[2]	6,077	6,822
Fair Value Recurring [Member]
Financial assets
Cash, cash equivalents, and federal funds sold	[1]	169,125	149,845
Equity investments		16,374	11,430
Investment securities		53,038	54,282
Loans receivable		2,144,599	2,131,651
Accrued interest receivable	[2]	12,673	13,538
Equity securities, fair value	[3]	1,730	1,748
Financial liabilities
Funds borrowed		2,145,596	2,118,689
Accrued interest payable	[2]	$ 6,077	$ 6,822

[1] Categorized as level 1 within the fair value hierarchy, excluding $1.3 million in interest bearing deposits categorized as level 2 as of March 31, 2024 and $1.3 million as of December 31, 2023. See Note 13.

[2] Categorized as level 3 within the fair value hierarchy. See Note 13.

[3] Included within other assets on the balance sheet.