Stockholders' Equity (Stock Rollforward) (Details)	9 Months Ended
	Sep. 30, 2019 shares
Increase (Decrease) in Stock by Class [Roll Forward]
Common stock, beginning of period	20,124,378
Treasury stock, beginning of period	601,289
Changes related to deferred compensation plan for Boards of Directors:
Common stock, end of period	21,149,122
Treasury stock, end of period	493,742
Common Stock
Increase (Decrease) in Stock by Class [Roll Forward]
Common stock, beginning of period	20,124,378
Changes related to stock-based compensation awards:
Cancellation of restricted common shares	0
Changes related to deferred compensation plan for Boards of Directors:
Common shares issued under dividend reinvestment plan	19,266
Common stock, end of period	21,149,122
Treasury Stock
Increase (Decrease) in Stock by Class [Roll Forward]
Treasury stock, beginning of period	601,289
Changes related to stock-based compensation awards:
Release of restricted common shares	19,174
Cancellation of restricted common shares	10,240
Grant of common shares	(5,130)
Changes related to deferred compensation plan for Boards of Directors:
Purchase of treasury stock	5,497
Disbursed out of treasury stock	(2,187)
Stock Repurchased During Period, Shares	14,175
Common shares issued under compensation plan for Boards of Directors	(5,103)
Common shares issued under employee stock purchase plan	(10,287)
Treasury stock, end of period	493,742
Restricted Shares | Treasury Stock
Changes related to stock-based compensation awards:
Grant of common shares	(133,926)
FIRST PRESTONSBURG BANCSHARES INC. [Member] | Common Stock
Changes related to deferred compensation plan for Boards of Directors:
Stock Issued During Period, Shares, Acquisitions	1,005,478