Condensed Financial Information (Parent Company Only) (Condensed Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash on deposit with Bank	$ 21,131	$ 20,336
Cash on deposit with others	11,192	13,078
Cash and cash equivalents	32,323	33,414
Other Assets	21,412	19,665
Total assets	2,063,776	2,049,313
Liabilities
Other borrowings	17,573	17,988
Other liabilities	20,034	17,240
Total liabilities	1,836,964	1,846,950
Stockholders' Equity	226,812	202,363	$ 150,282	$ 140,038
Total liabilities and stockholders' equity	2,063,776	2,049,313
MutualFirst Financial, Inc.
Assets
Cash on deposit with Bank	2,974	3,590
Cash on deposit with others	102	95
Cash and cash equivalents	3,076	3,685	$ 12,030	$ 1,122
Investment in common stock of Bank	239,917	214,195
Other Assets	1,444	2,838
Total assets	244,437	220,718
Liabilities
Other borrowings	17,573	17,988
Other liabilities	52	367
Total liabilities	17,625	18,355
Stockholders' Equity	226,812	202,363
Total liabilities and stockholders' equity	$ 244,437	$ 220,718