CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Operating Activities
Net income	$ 5,611us-gaap_NetIncomeLoss	$ 5,715us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	446	493
Depreciation expense	764us-gaap_DepreciationAndAmortization	944us-gaap_DepreciationAndAmortization
Investment securities amortization and accretion, net	509	411
Stock-based compensation expense	198us-gaap_ShareBasedCompensation	176us-gaap_ShareBasedCompensation
Amortization of intangible assets	287us-gaap_AmortizationOfIntangibleAssets	287us-gaap_AmortizationOfIntangibleAssets
Net gain on sale of investment securities	0us-gaap_GainLossOnInvestments	(166)us-gaap_GainLossOnInvestments
Net increase in other real estate owned valuation allowance and loss on disposition	81	15
Originations of mortgage loans held for sale	(5,425)	0
Proceeds from the sale of mortgage loans	4,935	0
Gain on sale of mortgage loans	(129)us-gaap_GainLossOnSaleOfMortgageLoans	0us-gaap_GainLossOnSaleOfMortgageLoans
Decrease in trading assets	149	180
Decrease (increase) in other assets	169	(1,278)
Increase (decrease) in other liabilities	412	(366)
Net cash provided by operating activities	8,007	6,411
Investing Activities
Proceeds from sales and maturities of available-for-sale securities	37,132	33,205
Purchase of available-for-sale securities	(20,344)	(19,395)
Purchase of held-to-maturity securities	(16,076)	(5,976)
Net increase in loans	(20,293)	(40,892)
Purchase of Federal Home Loan Bank stock	0cac_PaymentsforFederalHomeLoanBankStock	(693)cac_PaymentsforFederalHomeLoanBankStock
Proceeds from the sale of other real estate owned	1,564	0
Recoveries of previously charged-off loans	133	237
Purchase of premises and equipment	(464)	(283)
Net cash used by investing activities	(18,348)	(33,797)
Financing Activities
Net increase in deposits	34,112us-gaap_IncreaseDecreaseInDeposits	22,899us-gaap_IncreaseDecreaseInDeposits
Repayments on Federal Home Loan Bank long-term advances	(19)	(18)
Net (decrease) increase in other borrowed funds	(29,392)	11,309
Common stock repurchased	0	(4,355)
Exercise of stock options and issuance of restricted stock, net of repurchase for tax withholdings and tax benefit	136	118
Cash dividends paid on common stock	(2,235)us-gaap_PaymentsOfDividendsCommonStock	(2,045)us-gaap_PaymentsOfDividendsCommonStock
Net cash provided by financing activities	2,602	27,908
Net (decrease) increase in cash and cash equivalents	(7,739)	522
Cash and cash equivalents at beginning of year	60,813	51,355
Cash and cash equivalents at end of period	53,074	51,877
Supplemental information
Interest paid	3,015us-gaap_InterestPaid	3,019us-gaap_InterestPaid
Income taxes paid	5us-gaap_IncomeTaxesPaid	1,500us-gaap_IncomeTaxesPaid
Transfer from loans to other real estate owned	1,439us-gaap_TransferOfOtherRealEstate	532us-gaap_TransferOfOtherRealEstate
Held-to-maturity securities purchased but unsettled	4,830	1,008
Common stock repurchased but unsettled	$ 0	$ 358

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

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The net cash inflow or outflow for the increase (decrease) in the beginning and end of period deposits balances.

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The amount of cash paid for interest during the period.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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The cash inflow from loans reinstated and recovered that were previously deemed uncollectible.

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No definition available.

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The net cash inflow or outflow in other borrowings not otherwise defined in the taxonomy.

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The cash inflow associated with the sale or maturity (principal being due) of securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities.

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The cash inflow from the sale assets received in full or partial satisfaction of a receivable including real and personal property; equity interests in corporations, partnerships, and joint ventures; and beneficial interests in trusts. Foreclosed assets also include loans that are treated as if the underlying collateral had been foreclosed because the institution has taken possession of the collateral, even though legal foreclosure or repossession proceedings have not taken place.

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The cash inflow from sales of loans that are secured with real estate mortgages and are held with the intention to resell in the near future.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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Amount of the valuation allowance for real estate owned that was applied in the period against the carrying amount of real estate owned that was sold, written down or written off.

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-Article 9

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The cash outflow for the payment of loan drawn from Federal Home Loan.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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Value transferred out of real estate owned (REO) in noncash transactions.

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