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Note 9 - Deposits (Details) - Remaining Maturity of Time Deposits (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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Remaining Maturity of Time Deposits [Abstract] |  |  |
Three months or less | $ 104,482 egbn_ContractualMaturitiesTimeDepositsThreeMonthsOrLess | $ 82,790 egbn_ContractualMaturitiesTimeDepositsThreeMonthsOrLess | $ 102,022 egbn_ContractualMaturitiesTimeDepositsThreeMonthsOrLess
More than three months through six months | 106,861 egbn_ContractualMaturitiesTimeDepositsThreeMonthsThroughSixMonths | 109,101 egbn_ContractualMaturitiesTimeDepositsThreeMonthsThroughSixMonths | 88,156 egbn_ContractualMaturitiesTimeDepositsThreeMonthsThroughSixMonths
More than six months through twelve months | 182,187 egbn_ContractualMaturitiesTimeDepositsSixMonthsThrough12Months | 118,646 egbn_ContractualMaturitiesTimeDepositsSixMonthsThrough12Months | 104,122 egbn_ContractualMaturitiesTimeDepositsSixMonthsThrough12Months
Over twelve months | 295,211 egbn_ContractualMaturitiesTimeDepositsAfter12Months | 135,800 egbn_ContractualMaturitiesTimeDepositsAfter12Months | 232,850 egbn_ContractualMaturitiesTimeDepositsAfter12Months
Total | $ 688,741 us-gaap_TimeDeposits | $ 446,337 us-gaap_TimeDeposits | $ 527,150 us-gaap_TimeDeposits

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- Definition The amount of contractual maturities of domestic and foreign time deposits (including certificates of deposits, individual retirement accounts and open accounts) after twelve months from the balance sheet date. + References No definition available. + Details
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Namespace Prefix: | egbn_
Data Type: | xbrli:monetaryItemType
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Period Type: | instant

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- Definition The amount of contractual maturities of domestic and foreign time deposits (including certificates of deposits, individual retirement accounts and open accounts) for the period from six months through twelve months after the balance sheet date. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition The amount of contractual maturities of domestic and foreign time deposits (including certificates of deposits, individual retirement accounts and open accounts for three months or less from the balance sheet date. + References No definition available. + Details
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- Definition The amount of contractual maturities of domestic and foreign time deposits (including certificates of deposits, individual retirement accounts and open accounts) for the period from three months through six months after the balance sheet date. + References No definition available. + Details
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Namespace Prefix: | egbn_
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- Details
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- Definition Amount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + Details
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