Convertible Notes and Subordinated Debentures - Summary of Trust Preferred Securities and Debentures (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 126,000,000.0
Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	126,000,000
Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 109,140,000	$ 107,800,000
Nara Capital Trust III
Subordinated Borrowing [Line Items]
Current Rate	7.77%
Nara Capital Trust III \| Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 5,000,000
Nara Capital Trust III \| Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 5,155,000
Nara Statutory Trust IV
Subordinated Borrowing [Line Items]
Current Rate	7.77%
Nara Statutory Trust IV \| Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 5,000,000
Nara Statutory Trust IV \| Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 5,155,000
Nara Statutory Trust V
Subordinated Borrowing [Line Items]
Current Rate	7.56%
Nara Statutory Trust V \| Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 10,000,000
Nara Statutory Trust V \| Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 10,310,000
Nara Statutory Trust VI
Subordinated Borrowing [Line Items]
Current Rate	6.27%
Nara Statutory Trust VI \| Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 8,000,000
Nara Statutory Trust VI \| Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 8,248,000
Center Capital Trust I
Subordinated Borrowing [Line Items]
Current Rate	7.77%
Center Capital Trust I \| Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 18,000,000
Center Capital Trust I \| Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 15,473,000
Wilshire Trust II
Subordinated Borrowing [Line Items]
Current Rate	6.40%
Wilshire Trust II \| Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 20,000,000
Wilshire Trust II \| Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 16,937,000
Wilshire Trust III
Subordinated Borrowing [Line Items]
Current Rate	6.02%
Wilshire Trust III \| Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 15,000,000
Wilshire Trust III \| Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 12,148,000
Wilshire Trust IV
Subordinated Borrowing [Line Items]
Current Rate	6.00%
Wilshire Trust IV \| Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 25,000,000
Wilshire Trust IV \| Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 19,570,000
Saehan Capital Trust I
Subordinated Borrowing [Line Items]
Current Rate	6.21%
Saehan Capital Trust I \| Trust Preferred Security Amount
Subordinated Borrowing [Line Items]
Trust Preferred Security Amount	$ 20,000,000
Saehan Capital Trust I \| Carrying Value of Subordinated Debentures
Subordinated Borrowing [Line Items]
Carrying Value of Subordinated Debentures	$ 16,144,000