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, 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			8,895		8,895
Other comprehensive income, net of tax				4,340	4,340
Exercise of stock options	$ 494	(82)			412
Exercise of stock options (in shares)	27,570
Stock compensation costs		151			151
Cash dividends			(2,754)		(2,754)
Balance at Mar. 31, 2019	$ 113,001	3,135	170,258	(2,326)	284,068
Balance (in shares) at Mar. 31, 2019	15,328,030
Balance at Dec. 31, 2019	$ 113,179	3,307	186,867	5,932	309,285
Balance (in shares) at Dec. 31, 2019	15,285,118
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			7,807		7,807
Other comprehensive income, net of tax				7,678	7,678
Exercise of stock options	$ 250	(69)			181
Exercise of stock options (in shares)	16,970
Stock compensation costs		129			129
Stock repurchase	$ (829)		(1,733)		(2,562)
Stock repurchase (in shares)	(112,050)
Cash dividends			(3,059)		(3,059)
Balance at Mar. 31, 2020	$ 112,600	$ 3,367	$ 189,882	$ 13,610	$ 319,459
Balance (in shares) at Mar. 31, 2020	15,190,038