Derivative Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivatives not designated as hedging instruments
Mortgage Banking Derivatives Assets, Carrying Value	$ 884fdef_DerivativeAssetsCarryingValue	$ 351fdef_DerivativeAssetsCarryingValue
Mortgage Banking Derivatives Liabilities, Carrying Value	119fdef_DerivativeLiabilitiesCarryingValue	24fdef_DerivativeLiabilitiesCarryingValue
Mortgage Banking Derivatives, Net Carrying Value	$ 765	$ 327

Carrying values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

No definition available.

Name:	fdef_DerivativeAssetsCarryingValue
Namespace Prefix:	fdef_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant