Goodwill and Other Amortizing Intangible Assets - Summarized Other Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 24,856	$ 24,856
Accumulated Amortization	(16,169)	(13,223)
Net Intangible Assets	8,687	11,633
Customer deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	22,573	22,573
Accumulated Amortization	(14,407)	(11,653)
Net Intangible Assets	8,166	10,920
Customer list intangible
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	2,283	2,283
Accumulated Amortization	(1,762)	(1,570)
Net Intangible Assets	$ 521	$ 713