Total borrowing capacity of the federal funds purchased lines maintained by the entity.

No definition available.

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Namespace Prefix:	cwbc_
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Balance Type:	credit
Period Type:	instant

- References

No definition available.

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- Definition

Minimum total risked based capital ratio as required by the line of credit agreement.

+ References

No definition available.

+ Details

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- Definition

Minimum debt service coverage ratio required to be maintained under the line of credit agreement.

+ References

No definition available.

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Data Type:	xbrli:pureItemType
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- Definition

The percentage of common stock collateralized under a revolving line of credit agreement.

+ References

No definition available.

+ Details

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- Definition

The percentage of a specific compensating deposit arrangement that is required to be maintained under an agreement with the lender.

+ References

No definition available.

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- Definition

Minimum Tier 1 leverage ratio as required by the line of credit agreement.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
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- Definition

Period for advances to be collateralized, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

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Balance Type:	credit
Period Type:	instant

- References

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of a specific compensating balance arrangement that is maintained under an agreement for a bank loan or future credit availability.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of short term borrowing where a bank borrows, at the federal funds rate, from another bank.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22 (b))
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-Topic 942
-SubTopic 470
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Interest expense incurred during the reporting period on long-term borrowings associated with Federal Home Loan Bank and Federal Reserve Bank advances.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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-SubTopic 10
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Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

+ Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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- Definition

The carrying amount, as of the date of the latest financial statement presented, of loans receivable which are owned but transferred to serve as collateral for the payment of FHLB debt obligations, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)(i)
-URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729

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- Definition

The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for FHLB debt obligations, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party.

+ References

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- Details

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OTHER BORROWINGS (Details) $ in Millions	6 Months Ended
OTHER BORROWINGS (Details) $ in Millions	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Jul. 31, 2019 USD ($)
Financial Home Loan Bank Advances [Abstract]
FHLB advances	$ 90.0		$ 105.0
Letter of credit with FHLB	26.0
Securities pledged to FHLB	15.4		18.9
Loans pledged to FHLB	300.9		304.7
Available for additional borrowing	104.2		81.4
Total FHLB interest expense	0.5	$ 0.4
Federal Funds Purchased Lines [Abstract]
Federal funds borrowing lines at correspondent banks	20.0
Federal funds amount outstanding	$ 0.0		0.0
Federal Reserve Bank Advances [Member]
Federal Reserve Bank [Abstract]
Period for advances to be collateralized	28 days
Available borrowing capacity	$ 110.7		$ 102.7
Federal Reserve Bank Advances [Member] \| PPPLF [Member]
Federal Reserve Bank [Abstract]
Available borrowing capacity	$ 0.0
Line of Credit [Member]
Line of Credit [Abstract]
Maximum borrowing capacity				$ 10.0
Percentage of collateralized common stock	100.00%
Percentage of compensating deposit with the lender	25.00%
Required compensating deposit	$ 0.0
Minimum debt service coverage ratio	1.65
Minimum Tier 1 leverage ratio	7.00%
Minimum total risk-based capital ratio	10.00%
Outstanding balance	$ 0.0