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Note 9 - Deposits (Details) - Deposit Composition and Interest Rate (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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Deposit Composition and Interest Rate [Abstract] |  |  |
Noninterest bearing demand | $ 1,175,799 us-gaap_NoninterestBearingDepositLiabilities | $ 849,409 us-gaap_NoninterestBearingDepositLiabilities | $ 881,390 us-gaap_NoninterestBearingDepositLiabilities
Interest bearing transaction | 143,628 us-gaap_InterestBearingDepositLiabilities | 118,580 us-gaap_InterestBearingDepositLiabilities | 113,813 us-gaap_InterestBearingDepositLiabilities
Interest bearing transaction | 0.13%egbn_WeightedAverageInterestRateInterestBearingTransactionDeposits | 0.26%egbn_WeightedAverageInterestRateInterestBearingTransactionDeposits | 0.34%egbn_WeightedAverageInterestRateInterestBearingTransactionDeposits
Savings and money market | 2,302,600 egbn_DepositsSavingsAndMoneyMarketDeposits | 1,811,088 egbn_DepositsSavingsAndMoneyMarketDeposits | 1,374,869 egbn_DepositsSavingsAndMoneyMarketDeposits
Savings and money market | 0.32%egbn_WeightedAverageInterestRateSavingsAndMoneyMarketDeposits | 0.35%egbn_WeightedAverageInterestRateSavingsAndMoneyMarketDeposits | 0.48%egbn_WeightedAverageInterestRateSavingsAndMoneyMarketDeposits
Time, $100,000 or more | 393,132 us-gaap_TimeDeposits100000OrMore | 203,706 us-gaap_TimeDeposits100000OrMore | 232,875 us-gaap_TimeDeposits100000OrMore
Time, $100,000 or more | 0.68%us-gaap_WeightedAverageInterestRateOfTimeDeposits100000OrMore | 0.88%us-gaap_WeightedAverageInterestRateOfTimeDeposits100000OrMore | 1.12%us-gaap_WeightedAverageInterestRateOfTimeDeposits100000OrMore
Other time | 295,609 us-gaap_TimeDepositsLessThan100000 | 242,631 us-gaap_TimeDepositsLessThan100000 | 294,275 us-gaap_TimeDepositsLessThan100000
Other time | 0.70%us-gaap_WeightedAverageInterestRateOfTimeDeposits100000OrMoreThreeMonthsOrLess | 0.54%us-gaap_WeightedAverageInterestRateOfTimeDeposits100000OrMoreThreeMonthsOrLess | 0.71%us-gaap_WeightedAverageInterestRateOfTimeDeposits100000OrMoreThreeMonthsOrLess
Total | $ 4,310,768 us-gaap_Deposits | $ 3,225,414 us-gaap_Deposits | $ 2,897,222 us-gaap_Deposits

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- Details
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- Definition Amount of deposits in accounts that offer many of the same services as checking accounts although transactions may be somewhat more limited, share some of the characteristics of a money market fund and are insured by the Federal government, also known as money market accounts. Includes deposits in savings accounts. + References No definition available. + Details
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- Definition The weighted average rate for interest bearing transaction deposits. + References No definition available. + Details
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- Definition The weighted average rate for savings and money market deposits. + References No definition available. + Details
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- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. + 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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- Definition The aggregate of all domestic and foreign interest-bearing deposit liabilities. + 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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- Definition The aggregate amount of all domestic and foreign noninterest-bearing deposits liabilities held by the entity. + 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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- Definition The aggregate amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $100,000 or more. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6479006&loc=d3e64164-112818 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 3 -Section V -Paragraph A -Subparagraph 4 + Details
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- Definition The aggregate amount of domestic or foreign time deposits (including certificates of deposits, individual retirement accounts and open accounts) that total to less than $100,000. + References No definition available. + Details
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- Definition The weighted average interest rate of all domestic and foreign time deposits (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $100,000 or more, at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 3 -Section V -Paragraph A -Subparagraph 4 + Details
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- Definition The weighted average interest rate of domestic and foreign time deposits (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $100,000 or more, with maturities of three months or less. + References No definition available. + Details
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