Junior Subordinated Debentures Issued to Capital Trusts - Schedule of Outstanding Junior Subordinated Debentures and Related Trust Preferred Securities Issued by Each Trust (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Carrying value	$ 57,108,000	$ 56,760,000
Junior Subordinated Debentures | GCB Capital Trust III
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Carrying value	24,743,000	24,743,000
Contractual principal balance	$ 24,743,000	$ 24,743,000
Junior Subordinated Debentures | GCB Capital Trust III | London Interbank Offered Rate (LIBOR)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Annual interest rate spread, percentage		1.40%
Junior Subordinated Debentures | GCB Capital Trust III | Secured Overnight Financing Rate (SOFR)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Annual interest rate spread, percentage	1.40%	1.40%
Adjustment rate	0.26161%
Junior Subordinated Debentures | State Bancorp Capital Trust I
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Carrying value	$ 9,425,000	$ 9,325,000
Contractual principal balance	$ 10,310,000	$ 10,310,000
Junior Subordinated Debentures | State Bancorp Capital Trust I | London Interbank Offered Rate (LIBOR)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Annual interest rate spread, percentage		3.45%
Junior Subordinated Debentures | State Bancorp Capital Trust I | Secured Overnight Financing Rate (SOFR)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Annual interest rate spread, percentage	3.45%	3.45%
Junior Subordinated Debentures | State Bancorp Capital Trust II
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Carrying value	$ 8,991,000	$ 8,860,000
Contractual principal balance	$ 10,310,000	$ 10,310,000
Junior Subordinated Debentures | State Bancorp Capital Trust II | London Interbank Offered Rate (LIBOR)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Annual interest rate spread, percentage		2.85%
Junior Subordinated Debentures | State Bancorp Capital Trust II | Secured Overnight Financing Rate (SOFR)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Annual interest rate spread, percentage	2.85%	2.85%
Junior Subordinated Debentures | Aliant Statutory Trust II
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Carrying value	$ 13,949,000	$ 13,832,000
Contractual principal balance	$ 15,464,000	$ 15,464,000
Junior Subordinated Debentures | Aliant Statutory Trust II | London Interbank Offered Rate (LIBOR)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Annual interest rate spread, percentage		1.80%
Junior Subordinated Debentures | Aliant Statutory Trust II | Secured Overnight Financing Rate (SOFR)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Annual interest rate spread, percentage	1.80%	1.80%
Trust preferred securities | GCB Capital Trust III
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Face value	$ 24,000,000	$ 24,000,000
Trust preferred securities | GCB Capital Trust III | London Interbank Offered Rate (LIBOR)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Annual distribution rate	1.40%	1.40%
Trust preferred securities | State Bancorp Capital Trust I
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Face value	$ 10,000,000	$ 10,000,000
Trust preferred securities | State Bancorp Capital Trust I | London Interbank Offered Rate (LIBOR)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Annual distribution rate	3.45%	3.45%
Trust preferred securities | State Bancorp Capital Trust II
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Face value	$ 10,000,000	$ 10,000,000
Trust preferred securities | State Bancorp Capital Trust II | London Interbank Offered Rate (LIBOR)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Annual distribution rate	2.85%	2.85%
Trust preferred securities | Aliant Statutory Trust II
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Face value	$ 15,000,000	$ 15,000,000
Trust preferred securities | Aliant Statutory Trust II | London Interbank Offered Rate (LIBOR)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Annual distribution rate	1.80%	1.80%