Employee Benefit Plans (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2009
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employee Contribution Plan Description				First Defiance matches 100% of the participants contributions up to 3% of compensation and then 50% of the participants contributions for the next 2% of compensation. Previously, matching contributions were 50% of the first 3% of participants contributions.
Employee Benefits Plans Contribution	$ 919,000	$ 868,000	$ 799,000
Liability for Future Policy Benefits, Period Expense (Income)	167,000	(35,000)	76,000
Liability for Future Policy Benefits, Total	$ 892,000	$ 724,000	$ 760,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.25%