Employee Benefit Plans (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
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	$ 799,000	$ 717,000	$ 660,000
Liability for Future Policy Benefits, Period Expense	76,000	137,000	547,000
Liability for Future Policy Benefits, Liabilities Assumed	$ 760,000	$ 683,000	$ 547,000