2.4.0.8100340 - Disclosure - Loans and Allowance for Loan Losses (Details 3)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$C_0000774569_20130401_20130630http://www.sec.gov/CIK0000774569duration2013-04-01T00:00:002013-06-30T00:00:00U_iso4217USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$C_0000774569_20120401_20120630http://www.sec.gov/CIK0000774569duration2012-04-01T00:00:002012-06-30T00:00:00U_iso4217USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$C_0000774569_20130101_20130630http://www.sec.gov/CIK0000774569duration2013-01-01T00:00:002013-06-30T00:00:00U_iso4217USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDfalsefalse$C_0000774569_20120101_20120630http://www.sec.gov/CIK0000774569duration2012-01-01T00:00:002012-06-30T00:00:00U_iso4217USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Analysis of changes in the allowance for loan losses2false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse38910003891USD$falsetruefalse2truefalsefalse31390003139USD$falsetruefalse3truefalsefalse38250003825USD$falsetruefalse4truefalsefalse30580003058USD$falsetruefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Balance at beginning of period3false 5us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-31000-31USD$falsefalsefalse2truefalsefalse-168000-168USD$falsefalsefalse3truefalsefalse-207000-207USD$falsefalsefalse4truefalsefalse-382000-382USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of direct write-downs of financing receivables charged against the allowance.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Loan charge-offs4false 5us-gaap_FinancingReceivableAllowanceForCreditLossesRecoveryus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse135000135USD$falsefalsefalse2truefalsefalse3700037USD$falsefalsefalse3truefalsefalse177000177USD$falsefalsefalse4truefalsefalse6200062USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of recovery of financing receivables doubtful of collection that were previously charged off.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Recoveries5false 5cldb_ChargeoffsNetOfRecoveriescldb_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse104000104USD$falsefalsefalse2truefalsefalse-131000-131USD$falsefalsefalse3truefalsefalse-30000-30USD$falsefalsefalse4truefalsefalse-320000-320USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCharge-offs net of recoveries.No definition available.false2Net loan charge-offs6false 5us-gaap_ProvisionForLoanLeaseAndOtherLossesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse150000150USD$falsefalsefalse2truefalsefalse330000330USD$falsefalsefalse3truefalsefalse350000350USD$falsefalsefalse4truefalsefalse600000600USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 168, 169, 170 -IssueDate 2006-05-01 -Chapter 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Provision charged to operations7false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse41450004145USD$falsefalsefalse2truefalsefalse33380003338USD$falsefalsefalse3truefalsefalse41450004145USD$falsefalsefalse4truefalsefalse33380003338USD$falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Balance at end of period8false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5false USDtruefalse$C_0000774569_us-gaapFinancingReceivableInformationByPortfolioSegmentAxis_us-gaapCommercialPortfolioSegmentMember_20130401_20130630http://www.sec.gov/CIK0000774569duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseCommercialus-gaap_FinancingReceivableInformationByPortfolioSegmentAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialPortfolioSegmentMemberus-gaap_FinancingReceivableInformationByPortfolioSegmentAxisexplicitMemberU_iso4217USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial9true 4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Analysis of changes in the allowance for loan losses10false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse619000619USD$falsefalsefalse2truefalsefalse534000534USD$falsefalsefalse3truefalsefalse639000639USD$falsefalsefalse4truefalsefalse565000565USD$falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Balance at beginning of period11false 5us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse-1000-1USD$falsefalsefalse4truefalsefalse-17000-17USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of direct write-downs of financing receivables charged against the allowance.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Loan charge-offs12false 5us-gaap_FinancingReceivableAllowanceForCreditLossesRecoveryus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse112000112USD$falsefalsefalse2truefalsefalse30003USD$falsefalsefalse3truefalsefalse116000116USD$falsefalsefalse4truefalsefalse50005USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of recovery of financing receivables doubtful of collection that were previously charged off.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Recoveries13false 5cldb_ChargeoffsNetOfRecoveriescldb_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse112000112USD$falsefalsefalse2truefalsefalse30003USD$falsefalsefalse3truefalsefalse115000115USD$falsefalsefalse4truefalsefalse-12000-12USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCharge-offs net of recoveries.No definition available.false2Net loan charge-offs14false 5us-gaap_ProvisionForLoanLeaseAndOtherLossesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-180000-180USD$falsefalsefalse2truefalsefalse6300063USD$falsefalsefalse3truefalsefalse-203000-203USD$falsefalsefalse4truefalsefalse4700047USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 168, 169, 170 -IssueDate 2006-05-01 -Chapter 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Provision charged to operations15false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse551000551USD$falsefalsefalse2truefalsefalse600000600USD$falsefalsefalse3truefalsefalse551000551USD$falsefalsefalse4truefalsefalse600000600USD$falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Balance at end of period16false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse9false USDtruefalse$C_0000774569_us-gaapFinancingReceivableInformationByPortfolioSegmentAxis_us-gaapCommercialRealEstatePortfolioSegmentMember_20130401_20130630http://www.sec.gov/CIK0000774569duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseCommercial real estateus-gaap_FinancingReceivableInformationByPortfolioSegmentAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstatePortfolioSegmentMemberus-gaap_FinancingReceivableInformationByPortfolioSegmentAxisexplicitMemberU_iso4217USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Commercial real estate17true 4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Analysis of changes in the allowance for loan losses18false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse27380002738USD$falsefalsefalse2truefalsefalse16550001655USD$falsefalsefalse3truefalsefalse26160002616USD$falsefalsefalse4truefalsefalse18030001803USD$falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Balance at beginning of period19false 5us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2truefalsefalse-16000-16USD$falsefalsefalse3truefalsefalse-72000-72USD$falsefalsefalse4truefalsefalse-16000-16USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of direct write-downs of financing receivables charged against the allowance.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Loan charge-offs20false 5us-gaap_FinancingReceivableAllowanceForCreditLossesRecoveryus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse30003USD$falsefalsefalse2truefalsefalse1600016USD$falsefalsefalse3truefalsefalse30003USD$falsefalsefalse4truefalsefalse1600016USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of recovery of financing receivables doubtful of collection that were previously charged off.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Recoveries21false 5cldb_ChargeoffsNetOfRecoveriescldb_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse30003USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse-69000-69USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCharge-offs net of recoveries.No definition available.false2Net loan charge-offs22false 5us-gaap_ProvisionForLoanLeaseAndOtherLossesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse294000294USD$falsefalsefalse2truefalsefalse445000445USD$falsefalsefalse3truefalsefalse488000488USD$falsefalsefalse4truefalsefalse297000297USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 168, 169, 170 -IssueDate 2006-05-01 -Chapter 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Provision charged to operations23false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse30350003035USD$falsefalsefalse2truefalsefalse21000002100USD$falsefalsefalse3truefalsefalse30350003035USD$falsefalsefalse4truefalsefalse21000002100USD$falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Balance at end of period24false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse13false USDtruefalse$C_0000774569_us-gaapFinancingReceivableInformationByPortfolioSegmentAxis_us-gaapConsumerPortfolioSegmentMember_20130401_20130630http://www.sec.gov/CIK0000774569duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseConsumer - otherus-gaap_FinancingReceivableInformationByPortfolioSegmentAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ConsumerPortfolioSegmentMemberus-gaap_FinancingReceivableInformationByPortfolioSegmentAxisexplicitMemberU_iso4217USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Consumer - other25true 4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Analysis of changes in the allowance for loan losses26false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse9300093USD$falsefalsefalse2truefalsefalse121000121USD$falsefalsefalse3truefalsefalse104000104USD$falsefalsefalse4truefalsefalse9200092USD$falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Balance at beginning of period27false 5us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-26000-26USD$falsefalsefalse2truefalsefalse-26000-26USD$falsefalsefalse3truefalsefalse-55000-55USD$falsefalsefalse4truefalsefalse-72000-72USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of direct write-downs of financing receivables charged against the allowance.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Loan charge-offs28false 5us-gaap_FinancingReceivableAllowanceForCreditLossesRecoveryus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1200012USD$falsefalsefalse2truefalsefalse1400014USD$falsefalsefalse3truefalsefalse4400044USD$falsefalsefalse4truefalsefalse2900029USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of recovery of financing receivables doubtful of collection that were previously charged off.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Recoveries29false 5cldb_ChargeoffsNetOfRecoveriescldb_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-14000-14USD$falsefalsefalse2truefalsefalse-12000-12USD$falsefalsefalse3truefalsefalse-11000-11USD$falsefalsefalse4truefalsefalse-43000-43USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCharge-offs net of recoveries.No definition available.false2Net loan charge-offs30false 5us-gaap_ProvisionForLoanLeaseAndOtherLossesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1300013USD$falsefalsefalse2truefalsefalse-19000-19USD$falsefalsefalse3truefalsefalse-1000-1USD$falsefalsefalse4truefalsefalse4100041USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 168, 169, 170 -IssueDate 2006-05-01 -Chapter 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Provision charged to operations31false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse9200092USD$falsefalsefalse2truefalsefalse9000090USD$falsefalsefalse3truefalsefalse9200092USD$falsefalsefalse4truefalsefalse9000090USD$falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Balance at end of period32false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse17false USDtruefalse$C_0000774569_us-gaapFinancingReceivableInformationByPortfolioSegmentAxis_us-gaapHomeEquityMember_20130401_20130630http://www.sec.gov/CIK0000774569duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseConsumer - home equityus-gaap_FinancingReceivableInformationByPortfolioSegmentAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_HomeEquityMemberus-gaap_FinancingReceivableInformationByPortfolioSegmentAxisexplicitMemberU_iso4217USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Consumer - home equity33true 4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Analysis of changes in the allowance for loan losses34false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse107000107USD$falsefalsefalse2truefalsefalse191000191USD$falsefalsefalse3truefalsefalse123000123USD$falsefalsefalse4truefalsefalse128000128USD$falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Balance at beginning of period35false 5us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2truefalsefalse-7000-7USD$falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse-58000-58USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of direct write-downs of financing receivables charged against the allowance.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Loan charge-offs36false 5us-gaap_FinancingReceivableAllowanceForCreditLossesRecoveryus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse40004USD$falsefalsefalse2truefalsefalse30003USD$falsefalsefalse3truefalsefalse90009USD$falsefalsefalse4truefalsefalse50005USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of recovery of financing receivables doubtful of collection that were previously charged off.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Recoveries37false 5cldb_ChargeoffsNetOfRecoveriescldb_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse40004USD$falsefalsefalse2truefalsefalse-4000-4USD$falsefalsefalse3truefalsefalse90009USD$falsefalsefalse4truefalsefalse-53000-53USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCharge-offs net of recoveries.No definition available.false2Net loan charge-offs38false 5us-gaap_ProvisionForLoanLeaseAndOtherLossesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1600016USD$falsefalsefalse2truefalsefalse-35000-35USD$falsefalsefalse3truefalsefalse-5000-5USD$falsefalsefalse4truefalsefalse7700077USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 168, 169, 170 -IssueDate 2006-05-01 -Chapter 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Provision charged to operations39false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse127000127USD$falsefalsefalse2truefalsefalse152000152USD$falsefalsefalse3truefalsefalse127000127USD$falsefalsefalse4truefalsefalse152000152USD$falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Balance at end of period40false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse21false USDtruefalse$C_0000774569_us-gaapFinancingReceivableInformationByPortfolioSegmentAxis_cldbResidentialRealEstatePortfolioSegmentMember_20130401_20130630http://www.sec.gov/CIK0000774569duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseResidential real estateus-gaap_FinancingReceivableInformationByPortfolioSegmentAxisxbrldihttp://xbrl.org/2006/xbrldicldb_ResidentialRealEstatePortfolioSegmentMemberus-gaap_FinancingReceivableInformationByPortfolioSegmentAxisexplicitMemberU_iso4217USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Residential real estate41true 4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Analysis of changes in the allowance for loan losses42false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse334000334USD$falsefalsefalse2truefalsefalse638000638USD$falsefalsefalse3truefalsefalse343000343USD$falsefalsefalse4truefalsefalse470000470USD$falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Balance at beginning of period43false 5us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-5000-5USD$falsefalsefalse2truefalsefalse-119000-119USD$falsefalsefalse3truefalsefalse-79000-79USD$falsefalsefalse4truefalsefalse-219000-219USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of direct write-downs of financing receivables charged against the allowance.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Loan charge-offs44false 5us-gaap_FinancingReceivableAllowanceForCreditLossesRecoveryus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse40004USD$falsefalsefalse2truefalsefalse10001USD$falsefalsefalse3truefalsefalse50005USD$falsefalsefalse4truefalsefalse70007USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of recovery of financing receivables doubtful of collection that were previously charged off.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Recoveries45false 5cldb_ChargeoffsNetOfRecoveriescldb_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-1000-1USD$falsefalsefalse2truefalsefalse-118000-118USD$falsefalsefalse3truefalsefalse-74000-74USD$falsefalsefalse4truefalsefalse-212000-212USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCharge-offs net of recoveries.No definition available.false2Net loan charge-offs46false 5us-gaap_ProvisionForLoanLeaseAndOtherLossesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse70007USD$falsefalsefalse2truefalsefalse-124000-124USD$falsefalsefalse3truefalsefalse7100071USD$falsefalsefalse4truefalsefalse138000138USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 168, 169, 170 -IssueDate 2006-05-01 -Chapter 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Provision charged to operations47false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse340000340USD$falsetruefalse2truefalsefalse396000396USD$falsetruefalse3truefalsefalse340000340USD$falsetruefalse4truefalsefalse396000396USD$falsetruefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Balance at end of periodfalseLoans and Allowance for Loan Losses (Details 3) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.cortland-banks.com/20130630/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesDetails3447