Regulatory Capital Requirements - Schedule of Capital Ratios (Details)	Dec. 31, 2022	Dec. 31, 2021
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Actual	0.128	0.135
Tier One Leverage Capital to Average Assets	0.097	0.087
Tier One Risk Based Capital to Risk Weighted Assets	0.132	0.139
Capital to Risk Weighted Assets	0.140	0.148
Banking Regulation, Capital Conservation Buffer [Abstract]	0.060	0.068
Heritage Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Actual	0.129	0.138
Tier One Leverage Capital to Average Assets	0.094	0.086
Tier One Risk Based Capital to Risk Weighted Assets	0.129	0.138
Capital to Risk Weighted Assets	0.137	0.147
Banking Regulation, Capital Conservation Buffer [Abstract]	0.057	0.067

Capital conservation buffer percentage calculated as total risk-based capital ratio after deduction of minimum total risk-based capital ratio as defined by regulatory framework.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826

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Ratio of total risk-based capital to risk-weighted assets as defined by regulatory framework.

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Ratio of Common Equity Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework.

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Ratio of Tier 1 capital to average assets as defined by regulatory framework.

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