Subordinated Debentures and Convertible Notes (Tables)

12 Months Ended

Dec. 31, 2022

Subordinated Borrowings [Abstract]

Summary of Trust Preferred Securities and Debentures

The following table is a summary of trust preferred securities and Debentures at December 31, 2022:

Issuance Trust	Issuance Date	Trust Preferred Security Amount		Carrying Value of Debentures		Rate Type	Current Rate	Maturity Date
		(Dollars in thousands)
Nara Capital Trust III	06/05/2003	$	5,000	$	5,155	Variable	7.919%	06/15/2033
Nara Statutory Trust IV	12/22/2003	5,000		5,155		Variable	6.929%	01/07/2034
Nara Statutory Trust V	12/17/2003	10,000		10,310		Variable	7.688%	12/17/2033
Nara Statutory Trust VI	03/22/2007	8,000		8,248		Variable	6.419%	06/15/2037
Center Capital Trust I	12/30/2003	18,000		14,937		Variable	6.929%	01/07/2034
Wilshire Trust II	03/17/2005	20,000		16,435		Variable	6.528%	03/17/2035
Wilshire Trust III	09/15/2005	15,000		11,722		Variable	6.169%	09/15/2035
Wilshire Trust IV	07/10/2007	25,000		18,932		Variable	6.149%	09/15/2037
Saehan Capital Trust I	03/30/2007	20,000		15,671		Variable	6.350%	06/30/2037
Total		$	126,000	$	106,565

Convertible Debt

The value of the convertible notes at issuance and the carrying value as of December 31, 2022, 2021 and 2020 are presented in the tables below:

	Capitalization Period	Gross Carrying Amount		December 31, 2022
				Total Capitalization		Carrying Amount
		(Dollars in thousands)
Convertible notes principal balance		$	217,500	$	—	$	217,500
Issuance costs to be capitalized	5 years	(4,119)		3,767		(352)
Carrying balance of convertible notes		$	213,381	$	3,767	$	217,148

	Capitalization Period	Gross Carrying Amount		December 31, 2021
				Total Capitalization		Carrying Amount
		(Dollars in thousands)
Convertible notes principal balance		$	217,500	$	—	$	217,500
Issuance costs to be capitalized	5 years	(4,119)		2,828		(1,291)
Carrying balance of convertible notes		$	213,381	$	2,828	$	216,209

	Amortization/ Capitalization Period	Gross Carrying Amount		December 31, 2020
				Accumulated Amortization / Capitalization		Carrying Amount
		(Dollars in thousands)
Convertible notes principal balance		$	217,500	$	—	$	217,500
Discount	5 years	(21,880)		10,951		(10,929)
Issuance costs to be capitalized	5 years	(4,119)		2,113		(2,006)
Carrying balance of convertible notes		$	191,501	$	13,064	$	204,565