Short-term Borrowings (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Short-term Borrowings Disclosure [Abstract]
Remaining borrowing capacity	$ 2,100,000
Loans held for investment	3,508,751	$ 3,603,105
Federal Reserve Bank [Member]
Short-term Borrowings Disclosure [Abstract]
Remaining borrowing capacity	1,100,000
Collateral amount	1,400,000
Outstanding advances	$ 0	$ 0
Asset Pledged as Collateral [Member] | Federal Reserve Bank [Member]
Short-term Borrowings Disclosure [Abstract]
Interest rate	4.50%
Loans held for investment	$ 1,400,000
FHLB of San Francisco [Member]
Short-term Borrowings Disclosure [Abstract]
Maximum borrowing capacity	804,100
Collateral amount	$ 1,300,000
Interest rate	4.57%