Goodwill and Other Intangible Assets - Components of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 21,538	$ 41,800
Accumulated amortization	13,229	30,850
Net carrying amount	8,309	10,950
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	6,788	6,788
Accumulated amortization	6,597	6,329
Net carrying amount	191	459
Customer Related Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	2,476	4,162
Accumulated amortization	1,348	2,653
Net carrying amount	1,128	1,509
Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	12,274	30,850
Accumulated amortization	5,284	21,868
Net carrying amount	6,990	8,982
Valuation allowance included in accumulated amortization	$ 7	$ 98	$ 5	$ 13