Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balances (in shares) at Dec. 31, 2016		15,261,431
Beginning Balance at Dec. 31, 2016	$ 330,267	$ 15,261	$ 171,744	$ 149,666	$ (6,404)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	40,676			40,676
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	4,253				4,253
Reclass Upon Adoption of ASU 2018-02 (See Note 1 - Summary of Significant Accounting Policies)	0			469	(469)
Cash Dividends ($0.68, $0.60 and $0.52 per share in 2019, 2018 and 2017, respectively)	(11,842)			(11,842)
Issuance of Common Stock for 3-for-2 Stock Split (in shares)		7,642,726
Issuance of Common Stock for 3-for-2 Stock Split	(29)	$ 7,643	(7,672)
Restricted Share Grants (in shares)		30,246
Restricted Share Grants	1,246	$ 30	1,216
Ending Balances (in shares) at Dec. 31, 2017		22,934,403
Ending Balance at Dec. 31, 2017	364,571	$ 22,934	165,288	178,969	(2,620)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	46,529			46,529
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(4,478)				(4,478)
Cash Dividends ($0.68, $0.60 and $0.52 per share in 2019, 2018 and 2017, respectively)	(14,074)			(14,074)
Acquisitions (in shares)		1,987,698
Acquisitions	64,737	$ 1,988	62,749
Restricted Share Grants (in shares)		45,357
Restricted Share Grants	1,355	$ 45	1,310
Ending Balances (in shares) at Dec. 31, 2018		24,967,458
Ending Balance at Dec. 31, 2018	458,640	$ 24,967	229,347	211,424	(7,098)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	59,222			59,222
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	22,203				22,203
Cash Dividends ($0.68, $0.60 and $0.52 per share in 2019, 2018 and 2017, respectively)	(17,556)			(17,556)
Acquisitions (in shares)		1,663,954
Acquisitions	50,024	$ 1,664	48,360
Restricted Share Grants (in shares)		39,956
Restricted Share Grants	1,287	$ 40	1,247
Ending Balances (in shares) at Dec. 31, 2019		26,671,368
Ending Balance at Dec. 31, 2019	$ 573,820	$ 26,671	$ 278,954	$ 253,090	$ 15,105