Fair Value of Assets and Liabilities - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands		Sep. 30, 2022		Dec. 31, 2021
Assets
Interest-bearing deposits		$ 1,300
Fair Value Recurring [Member]
Assets
Interest-bearing deposits		1,250		$ 1,250
Available for sale investment securities		48,354		44,772
Equity securities, fair value	[1]	1,721		1,950
Total		51,325	[2]	47,972	[3]
Fair Value Recurring [Member] | Level 1 [Member]
Assets
Available for sale investment securities		0
Equity securities, fair value		1,721		1,950
Total		49,604	[2]	1,950	[3]
Fair Value Recurring [Member] | Level 2 [Member]
Assets
Interest-bearing deposits		1,250		1,250
Available for sale investment securities		48,354		44,772
Equity securities, fair value		0
Total		$ 1,721	[2]	$ 46,022	[3]

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

[2] Total unrealized losses of $1.5 million and $4.6 million, net of tax, was included in accumulated other comprehensive loss for the three and nine months ended September 30, 2022 related to these assets.

[3] Total unrealized losses of $1.0 million, net of tax, was included in accumulated other comprehensive income (loss) for the year ended December 31, 2021 related to these assets.