Purchase Price Based on Hypothetical Numbers (Details) - USD ($)		12 Months Ended
Nov. 30, 2023	Dec. 31, 2023
Pacific Western Bank
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 663,004,000	$ 663,004,000
BANC
Business Acquisition [Line Items]
Share Price		11.56
Pacific Western Bank
Business Acquisition [Line Items]
Share Price		$ 7.54

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 30
-Paragraph 8
-SubTopic 30
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479637/805-30-30-8

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-SubTopic 30
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479581/805-30-50-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 30
-Paragraph 7
-SubTopic 30
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479637/805-30-30-7

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration