Dividend Availability and Regulatory Matters Dividend Availability and Regulatory Matters (Details Textual) - USD ($) $ in Thousands		12 Months Ended			36 Months Ended
	Apr. 30, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Net (loss) earnings		$ (1,899,137)	$ 423,613	$ 606,959
Proceeds from Dividends Received		46,000
Retained (deficit) earnings		$ (518,301)	$ 1,420,624
Capital Required for Capital Adequacy to Risk Weighted Assets		8.00%
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum		6.00%
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum		4.50%
Tier One Leverage Capital Required for Capital Adequacy to Average Assets		4.00%
Capital Required to be Well Capitalized to Risk Weighted Assets		10.00%
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets		8.00%
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum		6.50%
Tier One Leverage Capital Required to be Well Capitalized to Average Assets		5.00%
Subordinated debt		$ 936,600
Tier One Capital, Trust Preferred Securities Capital Portion		131,000
Tier Two Capital, Trust Preferred Securities Capital Portion		790,800
April 30, 2021 Issuance
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Subordinated debt	$ 400,000
Subordinated Borrowing, Interest Rate	3.25%
Pacific Western Bank
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Net (loss) earnings					$ (800,000)
Payments of Ordinary Dividends					$ 357,000
Retained (deficit) earnings		$ (3,100,000)