Loans Accretable Yield Rollforward (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	$ 11,251	$ 9,378	$ 8,955	$ 6,704
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	199	2,019
Accretion	(1,763)	(1,392)
Ending balance	11,251	9,378
ASB Financial Corp. [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance		2,047
Ending balance		$ 2,047
FIRST PRESTONSBURG BANCSHARES INC. [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	3,860
Ending balance	$ 3,860