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Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Nov. 30, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Earnings Per Share [Abstract] |  |  |  |  |
Net Income (Loss) Available to Common Stockholders, Basic |  |  | $ 87,100 | $ (1,938,925) | $ 404,274
Weighted Average Number of Shares Issued, Basic |  |  | 168,921,000 | 86,563,000 | 78,875,000
Weighted Average Number of Shares, Restricted Stock |  |  | (480,000) | (1,169,407) | (1,604,412)
Weighted Average Number of Shares Outstanding, Basic, Total |  |  | 168,441,000 | 85,394,000 | 77,271,000
Basic income per share (usd per share) |  |  | $ 0.52 | $ (22.71) | $ 5.14
Net Income Loss From Continuing Operation Available To Common Stockholders Basic |  |  | $ 87,100 | $ (1,938,925) | $ 396,800
Diluted income per share (usd per share) |  |  | $ 0.52 | $ (22.71) | $ 5.14
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Net Income (Loss) Available to Common Stockholders, Basic |  |  | $ 87,100 | $ (1,938,925) | $ 404,274
Allocated to Common and Equivalent Shares | [1] |  |  |  | (7,474)
Undistributed Earnings, Basic |  |  | $ 87,158 | $ (1,938,925) | $ 396,800
Weighted Average Number of Shares Issued, Basic |  |  | 168,921,000 | 86,563,000 | 78,875,000
Weighted Average Number of Shares, Restricted Stock |  |  | 480,000 | 1,169,407 | 1,604,412
Weighted Average Number of Shares Outstanding, Basic |  |  | 168,441,000 | 85,394,000 | 77,271,000
Basic income per share (usd per share) |  |  | $ 0.52 | $ (22.71) | $ 5.14
Net Income Loss From Continuing Operation Available To Common Stockholders Basic |  |  | $ 87,100 | $ (1,938,925) | $ 396,800
Weighted Average Number of Shares Outstanding, Diluted |  |  | 168,684,000 | 85,394,000 | 77,271,000
Earnings Per Share, Diluted |  |  | $ 0.52 | $ (22.71) | $ 5.14
Pacific Western Bank |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Stock Issued During Period, Shares, Acquisitions |  | 0.6569 |  |  |
Common Stock |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Allocated to Common and Equivalent Shares |  |  |  | $ 0 |
Voting Common Stock | Common Stock |  |  |  |  |
Earnings Per Share [Abstract] |  |  |  |  |
Net Income (Loss) Available to Common Stockholders, Basic |  |  | $ 81,619 | $ (1,917,121) |
Weighted Average Number of Shares Issued, Basic |  |  | 158,321,000 | 85,603,000 |
Weighted Average Number of Shares, Restricted Stock |  |  | 480,000 | (1,169,000) |
Weighted Average Number of Shares Outstanding, Basic, Total |  |  | 157,841,000 | 84,434,000 |
Basic income per share (usd per share) |  |  | $ 0.52 | $ (22.71) |
Net Income Loss From Continuing Operation Available To Common Stockholders Basic |  |  | $ 81,619 | $ (1,917,121) |
Diluted income per share (usd per share) |  |  | $ 0.52 | $ (22.71) |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Net Income (Loss) Available to Common Stockholders, Basic |  |  | $ 81,619 | $ (1,917,121) |
Allocated to Common and Equivalent Shares |  |  |  | 0 |
Undistributed Earnings, Basic |  |  | $ 81,677 | $ (1,917,121) |
Weighted Average Number of Shares Issued, Basic |  |  | 158,321,000 | 85,603,000 |
Weighted Average Number of Shares, Restricted Stock |  |  | (480,000) | 1,169,000 |
Weighted Average Number of Shares Outstanding, Basic |  |  | 157,841,000 | 84,434,000 |
Basic income per share (usd per share) |  |  | $ 0.52 | $ (22.71) |
Net Income Loss From Continuing Operation Available To Common Stockholders Basic |  |  | $ 81,619 | $ (1,917,121) |
Weighted Average Number of Shares Outstanding, Diluted |  |  | 158,084,000 | 84,434,000 |
Earnings Per Share, Diluted |  |  | $ 0.52 | $ (22.71) |
Nonvoting Common Stock | Common Stock |  |  |  |  |
Earnings Per Share [Abstract] |  |  |  |  |
Net Income (Loss) Available to Common Stockholders, Basic |  |  | $ 5,235 | $ (20,884) |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Net Income (Loss) Available to Common Stockholders, Basic |  |  | 5,235 | (20,884) |
Allocated to Common and Equivalent Shares |  |  |  | 0 |
Undistributed Earnings, Basic |  |  | 5,235 | (20,884) |
Class B Non-Voting | Common Stock |  |  |  |  |
Earnings Per Share [Abstract] |  |  |  |  |
Net Income (Loss) Available to Common Stockholders, Basic |  |  | $ 246 | $ (920) |
Weighted Average Number of Shares Issued, Basic |  |  | 477,000 | 40,000 |
Weighted Average Number of Shares, Restricted Stock |  |  | 0 | 0 |
Weighted Average Number of Shares Outstanding, Basic, Total |  |  | 477,000 | 40,000 |
Basic income per share (usd per share) |  |  | $ 0.52 | $ 22.71 |
Net Income Loss From Continuing Operation Available To Common Stockholders Basic |  |  | $ 246 | $ (920) |
Diluted income per share (usd per share) |  |  | $ 0.52 | $ 22.71 |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Net Income (Loss) Available to Common Stockholders, Basic |  |  | $ 246 | $ (920) |
Allocated to Common and Equivalent Shares |  |  |  | 0 |
Undistributed Earnings, Basic |  |  | $ 246 | $ (920) |
Weighted Average Number of Shares Issued, Basic |  |  | 477,000 | 40,000 |
Weighted Average Number of Shares, Restricted Stock |  |  | 0 | 0 |
Weighted Average Number of Shares Outstanding, Basic |  |  | 477,000 | 40,000 |
Basic income per share (usd per share) |  |  | $ 0.52 | $ 22.71 |
Net Income Loss From Continuing Operation Available To Common Stockholders Basic |  |  | $ 246 | $ (920) |
Weighted Average Number of Shares Outstanding, Diluted |  |  | 477,000 | 40,000 |
Earnings Per Share, Diluted |  |  | $ 0.52 | $ 22.71 |
Non-Voting Common Stock Equivalents | Common Stock |  |  |  |  |
Earnings Per Share [Abstract] |  |  |  |  |
Weighted Average Number of Shares Issued, Basic |  |  | 10,123,000 | 920,000 |
Weighted Average Number of Shares, Restricted Stock |  |  | 0 | 0 |
Weighted Average Number of Shares Outstanding, Basic, Total |  |  | 10,123,000 | 920,000 |
Basic income per share (usd per share) |  |  | $ 0.52 | $ 22.71 |
Net Income Loss From Continuing Operation Available To Common Stockholders Basic |  |  | $ 5,235 | $ (20,884) |
Diluted income per share (usd per share) |  |  | $ 0.52 | $ 22.71 |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Weighted Average Number of Shares Issued, Basic |  |  | 10,123,000 | 920,000 |
Weighted Average Number of Shares, Restricted Stock |  |  | 0 | 0 |
Weighted Average Number of Shares Outstanding, Basic |  |  | 10,123,000 | 920,000 |
Basic income per share (usd per share) |  |  | $ 0.52 | $ 22.71 |
Net Income Loss From Continuing Operation Available To Common Stockholders Basic |  |  | $ 5,235 | $ (20,884) |
Weighted Average Number of Shares Outstanding, Diluted |  |  | 10,123,000 | 920,000 |
Earnings Per Share, Diluted |  |  | $ 0.52 | $ 22.71 |
[1] | (2) Represents cash dividends paid to holders of unvested restricted stock, net of forfeitures, plus undistributed earnings available to holders of unvested restricted stock, if any. (3) Diluted earnings per share is using the treasury method.

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- Definition This element represents the weighted average total number of shares issued throughout the period including the first (beginning balance outstanding) and last (ending balance outstanding) day of the period before considering any reductions (for instance, shares held in treasury) to arrive at the weighted average number of shares outstanding. Weighted average relates to the portion of time within a reporting period that common shares have been issued and outstanding to the total time in that period. Such concept is used in determining the weighted average number of shares outstanding for purposes of calculating earnings per share (basic). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482689/260-10-45-13 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482689/260-10-45-10 + Details
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482689/260-10-45-10 + Details
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- Definition Number of shares of restricted stock determined by relating the portion of time within a reporting period that restricted shares have been outstanding to the total time in that period. Restricted shares are subject to sales, contractual, regulatory or other restrictions that prevent or inhibit the holder from freely disposing of them before the restriction ends. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482689/260-10-45-13 + Details
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