Loan for granted forgiveness.

No definition available.

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Namespace Prefix:	calb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Amount of increase (decrease) of allowance reserve for credit loss.

+ References

No definition available.

+ Details

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

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 470
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-Section S99
-Paragraph 1
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+ Details

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

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
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Balance Type:	debit
Period Type:	instant

- Definition

Amount, before allowance and fees, of loans and leases receivable. Excludes loans and leases covered under loss sharing agreements.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period).

+ References

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-Topic 310
-SubTopic 40
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- Details

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Period Type:

Loans and Allowance For Credit Losses - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Loans	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) Loans	Jan. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest forgone on nonaccrual loans	$ 25,000	$ 31,000	$ 60,000	$ 84,000
Financing Receivable, Troubled Debt Restructuring	0		$ 0		$ 0
Financing Receivable, Modifications, Number of Contracts \| Loans			0		0
Increase Decrease In Allowance For Loan And Lease Losses	0		$ 0
Loans funded	1,587,901,000		1,587,901,000		$ 1,376,649,000
SBA Payment Protection Program [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans funded	491,200,000		491,200,000
Loan for granted forgiveness						$ 487,400,000
Loan Outstanding	$ 3,800,000		$ 3,800,000		$ 72,500,000