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Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements - Additional Information (Details) | 12 Months Ended |
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Dec. 31, 2021 USD ($) segment investment branch tranch | Dec. 31, 2020 USD ($)
Business Description and Basis of Presentation [Line Items] |  |
Total contractual lease payments | $ 25,000 |
Number of equity investments | investment | 2 |
Number of certified development entities | tranch | 3 |
Required funding percentage | 85.00% |
Number of operating segments | segment | 1 |
Minimum | Building and Building Improvements |  |
Business Description and Basis of Presentation [Line Items] |  |
Useful lives | 15 years |
Minimum | Furniture, fixtures and equipment |  |
Business Description and Basis of Presentation [Line Items] |  |
Useful lives | 3 years |
Maximum | Building and Building Improvements |  |
Business Description and Basis of Presentation [Line Items] |  |
Useful lives | 39 years |
Maximum | Furniture, fixtures and equipment |  |
Business Description and Basis of Presentation [Line Items] |  |
Useful lives | 7 years |
Heritage Bank |  |
Business Description and Basis of Presentation [Line Items] |  |
Number of branches operating | branch | 49 |
Investment Tax Credit Carryforward | Subsidiaries |  |
Business Description and Basis of Presentation [Line Items] |  |
Qualified equity investments | $ 25,000,000 | $ 9,800,000

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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599 + Details
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