Incentive plan granted.

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- Definition

Maximum risk rating range for loan and lease losses.

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Minimum risk rating range for loan and lease losses.

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- Definition

Represents the number of impaired available-for-sale securities sold.

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No definition available.

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- Definition

Number of wholly-owned trusts.

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- Definition

The percentage of a loan portfolio which is secured by Real Estate.

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No definition available.

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- Definition

Recognize tax benefit in percentage.

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No definition available.

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- Definition

Reduction in the value of common stock held in trust.

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- Definition

Share based compensation share based awards non qualified stock options exercise period.

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Minimum exercise price of non qualified stock options as percent of grant date fair value minimum.

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Share based compensation share based awards non qualified stock options term maximum.

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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-Topic 720

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This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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No definition available.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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- Definition

Amount of unrealized gain (loss) on investments in debt and equity securities classified as available-for-sale securities.

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Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

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Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

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Net increase or decrease in the carrying amount of the debt instrument for the period.

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-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.4-08.(f))

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-Name Regulation S-X (SX)

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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The cash outflow from the repayment of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets or underlying collateral.

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Note 2 - Summary of Significant Accounting Policies (Details) (USD $)	0 Months Ended	12 Months Ended			1 Months Ended
	Aug. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2015
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]
Number Of Wholly Owned Trusts		1boch_NumberOfWhollyOwnedTrusts	2boch_NumberOfWhollyOwnedTrusts
Repayments of Subordinated Debt		$ 4,629,000us-gaap_RepaymentsOfSubordinatedDebt
Gains (Losses) on Extinguishment of Debt		406,000
Reduction in Common Stock Held in Trust		155,000boch_ReductionInCommonStockHeldInTrust
Available-for-sale Equity Securities, Amortized Cost Basis	18,000,000
Available-for-sale Securities	18,800,000us-gaap_AvailableForSaleSecurities	186,986,000us-gaap_AvailableForSaleSecurities	216,640,000us-gaap_AvailableForSaleSecurities
Available-for-sale Securities, Gross Unrealized Gain	874,000
Available-for-sale Securities, Gross Unrealized Loss	35,000
Available-for-sale Securities, Gross Unrealized Gain (Loss)	839,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities		22,000	0	0
Minimum Risk Rating Range for Loan and Lease Losses		1
Maximum Risk Rating Range for Loan and Lease Losses		8
Percentage of Portfolio Secured by Real Estate		71.00%
Recognize Tax Benefit in Percentage		50.00%boch_RecognizeTaxBenefitInPercentage
Number of Operating Segments		1us-gaap_NumberOfOperatingSegments
Incentive Plan Granted		100.00%boch_IncentivePlanGranted
Minimum Exercise Price as a Percentage of Fair Value for Non Qualified Stock Options		85.00%
Share-based Compensation Share-based Awards Non Qualified Stock Options Term Maximum		10 years
Share-based Compensation Share-based Awards Non Qualified Stock Options Exercise Period		5 years
Advertising Expense		90,000us-gaap_AdvertisingExpense	110,000us-gaap_AdvertisingExpense	157,000us-gaap_AdvertisingExpense
Bank of Commerce Holdings Trust [Member] \| Junior Subordinated Debt [Member]
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]
Debt Instrument, Increase (Decrease), Net		(5,200,000)
Repayments of Subordinated Debt		4,600,000
Gains (Losses) on Extinguishment of Debt		$ 406,000
Subsequent Event [Member]
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]
Number of Available-for-Sale Securities Sold					3
Junior Subordinated Debt [Member]
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]
Number Of Wholly Owned Trusts		1	2