Summary of Significant Accounting Policies - Merger agreement with CVB Financial Corp (Details) - Heritage Commerce Corp and CVB Financial Corp - CVB Financial Corp. $ / shares in Units, $ in Thousands	Dec. 17, 2025 USD ($) office $ / shares
Business Combination [Line Items]
Consideration transferred	$ 811,000
Business combination, price per share (in dollars per share) \| $ / shares	$ 13.00
Expected recognized assets	$ 22,000,000
Number of offices and branches upon completion of acquisition \| office	75

Summary of Significant Accounting Policies - Merger agreement with CVB Financial Corp (Details) - Heritage Commerce Corp and CVB Financial Corp - CVB Financial Corp.
$ / shares in Units, $ in Thousands

Dec. 17, 2025

USD ($)

office

$ / shares

Business Combination [Line Items]

Consideration transferred

$ 811,000

Business combination, price per share (in dollars per share) | $ / shares

$ 13.00

Expected recognized assets

$ 22,000,000

Number of offices and branches upon completion of acquisition | office

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details