CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (loss) [Member]	Total
Balance at Dec. 31, 2016	$ 72,626	$ 2,832	$ 132,180	$ (1,760)	$ 205,878
Balance (in shares) at Dec. 31, 2016	13,776,589
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			19,539		19,539
Other comprehensive gain (loss), net of tax				(157)	(157)
Tax act reclassification			413	(413)
Exercise of stock options	$ 1,141	(377)			764
Exercise of stock options (in shares)	70,340
Stock compensation costs		476			476
Stock issued-acquisition	$ 37,371	6			37,377
Stock issued-acquisition (in shares)	1,376,431
Cash dividends			(7,935)		(7,935)
Balance at Dec. 31, 2017	$ 111,138	2,937	144,197	(2,330)	255,942
Balance (in shares) at Dec. 31, 2017	15,223,360
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			29,677		29,677
Other comprehensive gain (loss), net of tax				(4,336)	(4,336)
Exercise of stock options	$ 1,369	(238)			1,131
Exercise of stock options (in shares)	77,100
Stock compensation costs		373			373
Stock issued-acquisition		(6)			(6)
Cash dividends			(9,757)		(9,757)
Balance at Dec. 31, 2018	$ 112,507	3,066	164,117	(6,666)	273,024
Balance (in shares) at Dec. 31, 2018	15,300,460
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			35,961		35,961
Other comprehensive gain (loss), net of tax				12,598	12,598
Exercise of stock options	$ 1,337	(249)			1,088
Exercise of stock options (in shares)	82,681
Stock compensation costs		490			490
Stock repurchase	$ (665)		(1,879)		$ (2,544)
Stock repurchase (in shares)	(98,603)				(98,603)
Cash dividends			(11,332)		$ (11,332)
Balance at Dec. 31, 2019	$ 113,179	$ 3,307	$ 186,867	$ 5,932	$ 309,285
Balance (in shares) at Dec. 31, 2019	15,284,538