Regulatory Matters - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2024
Regulated Operations [Abstract]
CET1 capital ratio to be well capitalized under rules and prompt corrective provisions	6.50%
Total Tier 1 capital ratio to be well capitalized under rules and prompt corrective provisions	0.08
Total capital ratio to be well capitalized under rules and prompt corrective provisions	0.10
Leverage ratio to be well capitalized under rules and prompt corrective provisions	0.05
Capital conservation buffer desired rate	2.50%