Basis of Presentation

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation Of Financial Statements [Abstract]

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

1. Basis of Presentation

First Defiance Financial Corp. (“First Defiance” or the “Company”) is a unitary thrift holding company that conducts business through its three wholly owned subsidiaries, First Federal Bank of the Midwest (“First Federal”), First Insurance Group of the Midwest, Inc. (“First Insurance”), and First Defiance Risk Management, Inc. (“First Defiance Risk Management”). All significant intercompany transactions and balances are eliminated in consolidation.

First Federal is primarily engaged in attracting deposits from the general public through its offices and using those and other available sources of funds to originate loans primarily in the counties in which its offices are located. First Federal’s traditional banking activities include originating and servicing residential, commercial and consumer loans and providing a broad range of depository, trust and wealth management services. First Insurance is an insurance agency that does business in the Archbold, Bowling Green, Bryan, Defiance, Findlay, Fostoria, Lima, Maumee, Oregon, and Tiffin, Ohio areas, offering property and casualty, and group health and life insurance products. The Maumee and Oregon offices were consolidated into a new office in Sylvania, Ohio in January 2018. First Defiance Risk Management was incorporated on December 20, 2012, as a wholly owned insurance company subsidiary of the Company to insure the Company and its subsidiaries against certain risks unique to the operations of the Company and for which insurance may not be currently available or economically feasible in today’s insurance marketplace.