Loans and Allowance for Loan Losses - Schedule of Accretable Yield Collected on PCI Loans (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2022	Dec. 31, 2021
Receivables [Abstract]
Balance at beginning of year	$ 926	$ 2,261
Accretion of income	(88)	(1,335)
Balance at end of period	$ 838	$ 926

Loans and leases receivable purchase credit impaired loans on accretion of income.

No definition available.

Name:	tcbx_LoansAndLeasesReceivablePurchaseCreditImpairedLoansOnAccretionOfIncome
Namespace Prefix:	tcbx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration