XML 79 R64.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Investment Securities (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) Integer | Dec. 31, 2015 USD ($) Integer
Investments, Debt and Equity Securities [Abstract] |  |
Increase in amortized cost basis of available-for-sale securities $210,000 Net increase to accumulated | $ 210,000 |
Net increase to accumulated other comprehensive income net of tax | $ 7,400 |
Number of Investment Securities Sold | Integer | 84 | 74
Available-for-sale Securities Pledged as Collateral | $ 121,900 | $ 142,500
Description of Holding Securities | there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of stockholders' equity. | there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of stockholders' equity.

X
- Definition Description of holding securities. + References No definition available. + Details
Name: | cnob_DescriptionOfHoldingSecurities
Namespace Prefix: | cnob_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase in amortized cost basis of available-for-sale securities. + References No definition available. + Details
Name: | cnob_IncreaseInAmortizedCostBasisOfAvailableforsaleSecurities
Namespace Prefix: | cnob_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of investment securities sold. + References No definition available. + Details
Name: | cnob_NumberOfInvestmentSecuritiesSold
Namespace Prefix: | cnob_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value of available-for-sale securities that serve as collateral for borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5086-111524 + Details
Name: | us-gaap_AvailableForSaleSecuritiesPledgedAsCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of fresh-start adjustment to accumulated other comprehensive Income or Loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=34712771&loc=d3e56426-112766 + Details
Name: | us-gaap_FreshStartAdjustmentIncreaseDecreaseAccumulatedOtherComprehensiveIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration