XML 72 R55.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Investment Securities Available-for-Sale (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Amortized cost | $ 793,634 | $ 594,386
Gross unrealized gains | 2,321 | 1,928
Gross unrealized losses | 11,816 | 7,046
Estimated fair value | 784,139 | 589,268
US Agency Securities [Member] |  |
Amortized cost | 260,150 | 198,115
Gross unrealized gains | 228 | 283
Gross unrealized losses | 4,033 | 2,414
Estimated fair value | 256,345 | 195,984
Residential Mortgage Backed Securities [Member] |  |
Amortized cost | 477,949 | 322,067
Gross unrealized gains | 1,575 | 187
Gross unrealized losses | 7,293 | 4,418
Estimated fair value | 472,231 | 317,836
Municipal Bonds [Member] |  |
Amortized cost | 45,814 | 60,976
Gross unrealized gains | 439 | 1,295
Gross unrealized losses | 484 | 214
Estimated fair value | 45,769 | 62,057
Corporate Bonds [Member] |  |
Amortized cost | 9,503 | 13,010
Gross unrealized gains | 79 | 163
Gross unrealized losses | 6 |
Estimated fair value | 9,576 | 13,173
Investment Securities [Member] |  |
Amortized cost | 218 | 218
Estimated fair value | $ 218 | $ 218

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=egbn_EquityInvestmentOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |