Commitments, Guarantees and Contingent Liabilities (Details Textual) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2014	Dec. 31, 2013
Loss Contingencies [Line Items]
Line of Credit Facility, Period	60 days or less.
Commitments and Loans, Available to Sell	$ 17.8	$ 12.1

Represents commitments and loans available to sell at the reporting period.

No definition available.

Name:	fdef_CommitmentsAndLoansAvailableToSell
Namespace Prefix:	fdef_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant