LOANS HELD FOR INVESTMENT, Troubled Debt Restructured Loan (Details) $ in Millions	Dec. 31, 2022 USD ($)
Troubled Debt Restructurings [Abstract]
Loans classified as TDRs	$ 6.0
Performing [Member]
Troubled Debt Restructurings [Abstract]
Loans classified as TDRs	$ 5.8

Accumulated amortized cost of financing receivable modified as troubled debt restructuring.

No definition available.

Name:	cwbc_FinancingReceivableTroubledDebtRestructuringAmortizedCost
Namespace Prefix:	cwbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant