Commitments, Guarantees and Contingent Liabilities (Details Textual) (USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2013	Dec. 31, 2012
Line of Credit Facility, Period	60 days or less
Commitments and Loans, Available to Sell	$ 13.3	$ 53.6

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