Fair Value of Assets and Liabilities - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2025		Dec. 31, 2024
Assets
Equity securities, fair value	$ 1,800		$ 1,700
Level 1 [Member]
Assets
Equity securities, fair value	1,758		1,732
Level 2 [Member]
Assets
Equity securities, fair value	0		0
Fair Value Recurring [Member]
Assets
Investment securities	60,424	[1]	54,805	[2]
Equity securities, fair value	1,758		1,732
Total	62,182		56,537
Fair Value Recurring [Member] | Level 1 [Member]
Assets
Equity securities, fair value	1,758		1,732
Total	1,758		1,732
Fair Value Recurring [Member] | Level 2 [Member]
Assets
Investment securities	60,424	[1]	54,805	[2]
Total	$ 60,424		$ 54,805

[1] Total unrealized losses of $0.1 million, net of tax, related to these assets was included in comprehensive loss for the three months ended March 31, 2025.

[2] Total unrealized losses of less than $0.1 million, net of tax, related to these assets was included in other comprehensive loss for the year ended December 31, 2024.