v3.26.1
Investment Securities - Other narratives (Details) - USD ($)
3 Months Ended
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Investment Securities
Available-for-sale securities sold
$ 0
$ 0
$ 0
$ 0
X
- Definition
The amount of available for sale securities sold during the period.
+ References
No definition available.
+ Details
Name:
fdsb_DebtSecuritiesAvailableForSaleSecuritiesSold
Namespace Prefix:
fdsb_
Data Type:
xbrli:monetaryItemType
Balance Type:
debit
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration