Regulatory Capital Requirements - Capital Conservation Buffer (Details)	Mar. 31, 2024	Dec. 31, 2023
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Effective CET1 capital to risk-weighted assets (as a percent)	0.1255	0.1239
Effective Tier 1 capital to risk-weighted assets (as a percent)	0.1255	0.1239
Effective total capital to risk-weighted assets (as a percent)	0.1375	0.1357
Capital conservation buffer
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Effective CET1 capital to risk-weighted assets (as a percent)	0.07
Effective Tier 1 capital to risk-weighted assets (as a percent)	0.085
Effective total capital to risk-weighted assets (as a percent)	0.105
Capital requirements above regulatory rate (as a percent)	0.025