Business Combinations, Goodwill and Intangible Assets (Narrative) (Details) $ / shares in Units, $ in Thousands						1 Months Ended		3 Months Ended	12 Months Ended
	Jul. 01, 2019 USD ($) office $ / shares shares	Jun. 25, 2019 USD ($)	Oct. 15, 2018 USD ($) office shares	Oct. 14, 2018 USD ($) $ / shares	May 18, 2018 USD ($) office	Jan. 31, 2019 USD ($)	Jan. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 28, 2019 $ / shares	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Assets								$ 3,929,090	$ 4,397,672	$ 3,929,090	$ 3,144,360
Equity								458,640	573,820	458,640	364,571		$ 330,267
Goodwill								103,681	121,306	103,681	54,058		$ 54,058
Non-recurring merger costs excluded from pro-forma financial information									66,207	53,461
Amortization of expense intangible assets									3,721	1,752	942
Core Banking
Business Acquisition [Line Items]
Goodwill								102,349	119,974	102,349	52,726
Insurance
Business Acquisition [Line Items]
Goodwill								1,332	1,332	$ 1,332	$ 1,332
Acquisition-related Costs
Business Acquisition [Line Items]
Non-recurring merger costs excluded from pro-forma financial information									3,205
Citizens First
Business Acquisition [Line Items]
Direct acquisition costs	$ 3,300
Goodwill	17,089
Intangible Assets	4,547
Goodwill non-deductible for tax purposes	$ 17,100
Cash portion, cash per share for common stock converted (USD per share) | $ / shares	$ 5.80
Number of the Company's common stock for each share converted (in shares) | shares	0.6629
Shares of common stock issued for acquisition (in shares) | shares	1,664,000
Total cash consideration paid, including options and fractional shares	$ 15,500	$ 15,500
Fair value of non-impaired loans and customers receivables acquired	356,970
Pro forma net income									6,624
Pro forma revenues									$ 18,436
Equity Instruments	50,118
Cash for options and fractional shares	216
Loans	356,970
Cash consideration paid	15,294
Citizens First | Core Deposit Intangible
Business Acquisition [Line Items]
Intangible Assets	$ 4,500
Weighted average useful live of intangibles	8 years
Citizens First | Financial Asset Acquired and No Credit Deterioration
Business Acquisition [Line Items]
Fair value of non-impaired loans and customers receivables acquired	$ 349,900
Unpaid principal of non-impaired loans and customers receivables acquired	$ 353,300
Citizens First | CFB 401(k) Shares
Business Acquisition [Line Items]
Cash portion, cash per share for common stock converted (USD per share) | $ / shares												$ 25.77
Additional cash paid for each shares acquired (in dollar per share) | $ / shares												$ 5.80
First Security
Business Acquisition [Line Items]
Number of banking offices | office			11
Direct acquisition costs			$ 4,000
Goodwill			43,194
Intangible Assets			$ 6,139
Cash portion, cash per share for common stock converted (USD per share) | $ / shares				$ 12.00
Number of the Company's common stock for each share converted (in shares) | shares			0.7982
Shares of common stock issued for acquisition (in shares) | shares			1,988,000
Equity Instruments			$ 64,898	$ 29,886
Cash for options and fractional shares			132	$ 124
Loans			390,106
Cash consideration paid			31,039
First Security | Core Deposit Intangible
Business Acquisition [Line Items]
Intangible Assets			$ 6,100
Weighted average useful live of intangibles			8 years
First Security | Financial Asset Acquired and No Credit Deterioration
Business Acquisition [Line Items]
Fair value of non-impaired loans and customers receivables acquired			$ 382,400
Unpaid principal of non-impaired loans and customers receivables acquired			$ 385,400
First Security | KSOP Shares
Business Acquisition [Line Items]
Cash portion, cash per share for common stock converted (USD per share) | $ / shares				$ 40.00
Equity Instruments				$ 1,153
Branch Acquisition
Business Acquisition [Line Items]
Number of banking offices | office					5
Direct acquisition costs					$ 691
Goodwill					6,965
Intangible Assets					3,475
Deposits					175,700
Loans					116,305
Premium paid on deposits					$ 7,400	$ 100
Period to adjust premium paid on deposits					6 months
Loans put back after acquisition date								$ 1,300
Goodwill deductible for tax purposes					$ 7,000
Branch Acquisition | Core Deposit Intangible
Business Acquisition [Line Items]
Intangible Assets					$ 3,500
Weighted average useful live of intangibles					8 years
Branch Acquisition | INDIANA
Business Acquisition [Line Items]
Number of banking offices | office					5
Branch Acquisition | Columbus, Indiana
Business Acquisition [Line Items]
Number of banking offices | office					4
Branch Acquisition | Greensburg, Indiana
Business Acquisition [Line Items]
Number of banking offices | office					1
Citizens First
Business Acquisition [Line Items]
Number of banking offices | office	8
Assets	$ 456,000
Equity	$ 49,800
First Security
Business Acquisition [Line Items]
Assets				563,000
Equity				$ 58,300
German American Insurance, Inc. | Insurance Agency | INDIANA | Affiliated Entity
Business Acquisition [Line Items]
Weighted average useful live of intangibles							7 years
Cash consideration paid							$ 209
German American Insurance, Inc. | Insurance Agency | INDIANA | Customer List | Affiliated Entity
Business Acquisition [Line Items]
Intangible Assets							$ 209