XML 52 R42.htm IDEA: XBRL DOCUMENT
v3.23.2

Note 5 - Loans and Leases - Past Due Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Loans, gross |  | $ 1,629,664 | [1],[2] | $ 1,564,174 | [3],[4]
Loans Past Due and Still Accruing |  | 47 |  | 33 |
Commercial Portfolio Segment [Member] |  |  |  |  |
Loans, gross |  | 212,182 | [1] | 234,478 | [3]
Commercial Portfolio Segment [Member] | Commercial [Member] |  |  |  |  |
Loans, gross |  | 135,164 | [2] | 141,122 | [4]
Loans Past Due and Still Accruing |  | 0 |  | 0 |
Commercial Portfolio Segment [Member] | Municipal [Member] |  |  |  |  |
Loans, gross |  | 77,018 | [2] | 72,996 | [4]
Loans Past Due and Still Accruing |  | 0 |  | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Loans, gross |  | 648,613 | [1] | 606,618 | [3]
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] |  |  |  |  |
Loans, gross |  | 314,838 | [2] | 318,296 | [4]
Loans Past Due and Still Accruing |  | 0 |  | 0 |
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] |  |  |  |  |
Loans, gross |  | 294,718 | [2] | 284,677 | [4]
Loans Past Due and Still Accruing |  | 0 |  | 0 |
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Loans, gross |  | 39,057 | [2] | 24,005 | [4]
Loans Past Due and Still Accruing |  | 0 |  | 0 |
Consumer Portfolio Segment [Member] |  |  |  |  |
Loans, gross |  | 290,966 | [1],[5] | 282,710 | [3],[6]
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |
Loans, gross |  | 58,623 | [2] | 59,118 | [4]
Loans Past Due and Still Accruing |  | 0 |  | 0 |
Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] |  |  |  |  |
Loans, gross |  | 52,501 | [2] | 52,568 | [4]
Loans Past Due and Still Accruing |  | 0 |  | 0 |
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Recourse [Member] |  |  |  |  |
Loans, gross |  | 11,924 | [2] | 12,929 | [4]
Loans Past Due and Still Accruing |  | 0 |  | 0 |
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Nonrecourse [Member] |  |  |  |  |
Loans, gross |  | 121,230 | [2] | 114,909 | [4]
Loans Past Due and Still Accruing |  | 0 |  | 16 |
Consumer Portfolio Segment [Member] | Direct Financing Lease Net of Unearned Lease Revenue [Member] |  |  |  |  |
Loans, gross | [2],[7] | 32,806 |  |  |
Loans Past Due and Still Accruing |  | 47 |  |  |
Consumer Portfolio Segment [Member] | Direct Financing Lease [Member] |  |  |  |  |
Loans, gross |  | 32,806 | [7] | 31,477 | [4],[6]
Loans Past Due and Still Accruing |  | 47 |  | 17 |
Consumer Portfolio Segment [Member] | Other Loan [Member] |  |  |  |  |
Loans, gross |  | 13,882 | [2] | 11,709 | [4]
Loans Past Due and Still Accruing |  | 0 |  | 0 |
Residential Portfolio Segment [Member] |  |  |  |  |
Loans, gross |  | 477,903 | [1] | 440,368 | [3]
Residential Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Loans, gross |  | 48,087 | [2] | 42,232 | [4]
Loans Past Due and Still Accruing |  | 0 |  | 0 |
Residential Portfolio Segment [Member] | Real Estate Loan [Member] |  |  |  |  |
Loans, gross |  | 429,816 | [2] | 398,136 | [4]
Loans Past Due and Still Accruing |  | 0 |  | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |  |
Loans, gross |  | 880 |  | 1,152 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial [Member] |  |  |  |  |
Loans, gross |  | 11 |  | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Municipal [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] |  |  |  |  |
Loans, gross |  | 91 |  | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] |  |  |  |  |
Loans, gross |  | 104 |  | 42 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |
Loans, gross |  | 136 |  | 239 |
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] |  |  |  |  |
Loans, gross |  | 172 |  | 110 |
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Recourse [Member] |  |  |  |  |
Loans, gross |  | 46 |  | 152 |
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Nonrecourse [Member] |  |  |  |  |
Loans, gross |  | 90 |  | 411 |
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Direct Financing Lease Net of Unearned Lease Revenue [Member] |  |  |  |  |
Loans, gross |  | 170 |  |  |
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Direct Financing Lease [Member] |  |  |  |  |
Loans, gross |  |  |  | 186 |
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Other Loan [Member] |  |  |  |  |
Loans, gross |  | 28 |  | 12 |
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] |  |  |  |  |
Loans, gross |  | 32 |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |  |
Loans, gross |  | 268 |  | 686 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Municipal [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] |  |  |  |  |
Loans, gross |  | 199 |  | 151 |
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Recourse [Member] |  |  |  |  |
Loans, gross |  | 4 |  | 115 |
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Nonrecourse [Member] |  |  |  |  |
Loans, gross |  | 27 |  | 86 |
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Direct Financing Lease Net of Unearned Lease Revenue [Member] |  |  |  |  |
Loans, gross |  | 33 |  |  |
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Direct Financing Lease [Member] |  |  |  |  |
Loans, gross |  |  |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Other Loan [Member] |  |  |  |  |
Loans, gross |  | 5 |  | 7 |
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 327 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |  |
Loans, gross | [8] | 3,540 |  | 2,568 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial [Member] |  |  |  |  |
Loans, gross | [8] | 636 |  | 719 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Municipal [Member] |  |  |  |  |
Loans, gross | [8] | 0 |  | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] |  |  |  |  |
Loans, gross | [8] | 168 |  | 383 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] |  |  |  |  |
Loans, gross | [8] | 2,137 |  | 1,066 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Loans, gross | [8] | 0 |  | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |
Loans, gross | [8] | 102 |  | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] |  |  |  |  |
Loans, gross | [8] | 90 |  | 211 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Recourse [Member] |  |  |  |  |
Loans, gross | [8] | 9 |  | 11 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Nonrecourse [Member] |  |  |  |  |
Loans, gross | [8] | 84 |  | 158 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Direct Financing Lease Net of Unearned Lease Revenue [Member] |  |  |  |  |
Loans, gross | [8] | 47 |  |  |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Direct Financing Lease [Member] |  |  |  |  |
Loans, gross | [8] |  |  | 17 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Other Loan [Member] |  |  |  |  |
Loans, gross | [8] | 1 |  | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Loans, gross | [8] | 0 |  | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] |  |  |  |  |
Loans, gross | [8] | 266 |  | 3 |
Financial Asset, Past Due [Member] |  |  |  |  |
Loans, gross |  | 4,688 |  | 4,406 |
Financial Asset, Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial [Member] |  |  |  |  |
Loans, gross |  | 647 |  | 719 |
Financial Asset, Past Due [Member] | Commercial Portfolio Segment [Member] | Municipal [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] |  |  |  |  |
Loans, gross |  | 259 |  | 383 |
Financial Asset, Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] |  |  |  |  |
Loans, gross |  | 2,241 |  | 1,108 |
Financial Asset, Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |
Loans, gross |  | 238 |  | 239 |
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] |  |  |  |  |
Loans, gross |  | 461 |  | 472 |
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Recourse [Member] |  |  |  |  |
Loans, gross |  | 59 |  | 278 |
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Nonrecourse [Member] |  |  |  |  |
Loans, gross |  | 201 |  | 655 |
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] | Direct Financing Lease Net of Unearned Lease Revenue [Member] |  |  |  |  |
Loans, gross |  | 250 |  |  |
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] | Direct Financing Lease [Member] |  |  |  |  |
Loans, gross |  |  |  | 203 |
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] | Other Loan [Member] |  |  |  |  |
Loans, gross |  | 34 |  | 19 |
Financial Asset, Past Due [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Loans, gross |  | 0 |  | 0 |
Financial Asset, Past Due [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] |  |  |  |  |
Loans, gross |  | 298 |  | 330 |
Financial Asset, Not Past Due [Member] |  |  |  |  |
Loans, gross |  | 1,624,976 |  | 1,559,768 |
Financial Asset, Not Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial [Member] |  |  |  |  |
Loans, gross |  | 134,517 |  | 140,403 |
Financial Asset, Not Past Due [Member] | Commercial Portfolio Segment [Member] | Municipal [Member] |  |  |  |  |
Loans, gross |  | 77,018 |  | 72,996 |
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] |  |  |  |  |
Loans, gross |  | 314,579 |  | 317,913 |
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] |  |  |  |  |
Loans, gross |  | 292,477 |  | 283,569 |
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Loans, gross |  | 39,057 |  | 24,005 |
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |
Loans, gross |  | 58,385 |  | 58,879 |
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] | Home Equity Line of Credit [Member] |  |  |  |  |
Loans, gross |  | 52,040 |  | 52,096 |
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Recourse [Member] |  |  |  |  |
Loans, gross |  | 11,865 |  | 12,651 |
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Nonrecourse [Member] |  |  |  |  |
Loans, gross |  | 121,029 |  | 114,254 |
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] | Direct Financing Lease Net of Unearned Lease Revenue [Member] |  |  |  |  |
Loans, gross |  | 32,556 |  |  |
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] | Direct Financing Lease [Member] |  |  |  |  |
Loans, gross |  |  |  | 31,274 |
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] | Other Loan [Member] |  |  |  |  |
Loans, gross |  | 13,848 |  | 11,690 |
Financial Asset, Not Past Due [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Loans, gross |  | 48,087 |  | 42,232 |
Financial Asset, Not Past Due [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] |  |  |  |  |
Loans, gross |  | $ 429,518 |  | $ 397,806 |
[1] | Includes $4.9 million of net deferred loan costs.
[2] | Includes net deferred loan costs of $4.9 million.
[3] | Includes $4.6 million of net deferred loan costs.
[4] | Includes net deferred loan costs of $4.6 million.
[5] | Net of unearned lease revenue of $1.9 million
[6] | Net of unearned lease revenue of $1.7 million.
[7] | Net of unearned lease revenue of $1.9 million.
[8] | Includes non-accrual loans.

X
- Definition Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (b) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-7 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) -Publisher SEC Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) -Publisher SEC Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph (a) -Publisher SEC Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-14 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7A -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-7A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fdbc_CommercialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fdbc_MunicipalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fdbc_NonownerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fdbc_OwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_AutomobileLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RecourseStatusAxis=us-gaap_RecourseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RecourseStatusAxis=us-gaap_NonrecourseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fdbc_DirectFinancingLeaseNetOfUnearnedLeaseRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fdbc_DirectFinancingLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fdbc_OtherLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |