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Business Combination - Schedule of Assets Acquired and Liabilities Assumed at Estimated Fair Value (Parenthetical) (Details) - Regal Bancorp Inc	Sep. 19, 2023 $ / shares shares
Business Acquisition [Line Items]
Business acquisition, number of shares | shares	3,023,369
Business acquisition, share price | $ / shares	$ 23.00

X

- Definition

Business acquisition, number of shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	srbk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-5

+ Details

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X

- Definition

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: