Conversion (Details) - USD ($) $ / shares in Units, $ in Millions |
Dec. 27, 2023 |
Sep. 30, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Conversion | |||
| Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.01 | $ 0.01 | |
| Issuance of common shares donated to Needham Bank Charitable Foundation (in shares) | 1,708,229 | ||
| Donation in cash to Needham Bank Charitable Foundation | $ 2.0 | ||
| Public offering | |||
| Conversion | |||
| Number of shares sold pursuant to the plan | 40,997,500 | ||
| Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.01 | ||
| Share price | $ 10.00 | ||
| Gross offering proceeds | $ 410.0 |
| X | ||||||||||
- Definition The cash outflow from amount donated to charitable foundation. No definition available.
|
| X | ||||||||||
- 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. No definition available.
|
| X | ||||||||||
- Definition Number of new stock issued during the period for charity. No definition available.
|
| X | ||||||||||
- Definition Face amount or stated value per share of common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The cash inflow from the additional capital contribution to the entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Per share or per unit amount of equity securities issued. No definition available.
|
| X | ||||||||||
- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|