Loans, Covered Loans, Loss Share Payable (Receivable) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Sep. 30, 2014
Covered Loans, Loss Share Payable (Receivable) [Roll Forward]
Balance at Beginning of Period	$ 1,283
Paid to FDIC	(1,283)
Increase due to impairment	(14)
FDIC reimbursement	722
Shared loss expenses	(985)
Shared income	21
Adjustments from prior periods	(63)
Balance at End of Period	$ (319)

Covered Loans, Loss Share Payable (Receivable), Amount Paid From (Paid To) FDIC

No definition available.

Name:	cacb_CoveredLoansLossSharedPayableReceivableAmountPaidFromPaidToFDIC
Namespace Prefix:	cacb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Covered Loans, Loss Share Payable (Receivable,) Decrease (Increase) Due To Impairment

No definition available.

Name:	cacb_CoveredLoansLossSharedPayableReceivableDecreaseIncreaseDueToImpairment
Namespace Prefix:	cacb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Covered Loans, Loss Share Payable (Receivable), Adjustment from Prior Period

No definition available.

Name:	cacb_CoveredLoansLossSharePayableReceivableAdjustmentfromPriorPeriod
Namespace Prefix:	cacb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Covered Loans, Loss Share Payable (Receivable), FDIC Reimbursement

No definition available.

Name:	cacb_CoveredLoansLossSharePayableReceivableFDICReimbursement
Namespace Prefix:	cacb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Covered Loans, Loss Shared Payable (Receivable), Net

No definition available.

Name:	cacb_CoveredLoansLossSharePayableReceivableNet
Namespace Prefix:	cacb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Covered Loans, Loss Share Payable (Receivable), Shared Income

No definition available.

Name:	cacb_CoveredLoansLossSharePayableReceivableSharedIncome
Namespace Prefix:	cacb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Covered Loans, Loss Share Payable (Receivable), Shared Loss Expense

No definition available.

Name:	cacb_CoveredLoansLossSharePayableReceivableSharedLossExpense
Namespace Prefix:	cacb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Name:	cacb_LoansandLeasesReceivableCoveredRollForward
Namespace Prefix:	cacb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration