Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2019	0					22,604,000
Balance at Dec. 31, 2019	$ 0	$ 0	$ (8,823)	$ 0	$ (8,823)	$ 36,207	$ 35,714	$ 333,699	$ 677	$ 406,297
Net income						0	0	13,232	0	13,232
Other comprehensive loss						0	0	0	5,775	5,775
Stock compensation expense						$ 0	817	0	0	817
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations (in shares)						62,000
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations						$ 203	1,858	(3,546)	0	(1,485)
Cash dividends declared						$ 0	0	(6,111)	0	(6,111)
Shares cancelled (in shares)						1,000
Shares cancelled						$ (2)	(22)	24	0	0
Shares cancelled (in shares)						(1,000)
Balance (in shares) at Mar. 31, 2020						22,665,000
Balance at Mar. 31, 2020						$ 36,408	38,367	328,475	6,452	409,702
Balance (in shares) at Dec. 31, 2019	0					22,604,000
Balance at Dec. 31, 2019	$ 0	$ 0	$ (8,823)	$ 0	$ (8,823)	$ 36,207	35,714	333,699	677	406,297
Net income										26,600
Other comprehensive loss									8,139	8,139
Balance (in shares) at Jun. 30, 2020						22,667,000
Balance at Jun. 30, 2020						$ 36,415	39,425	335,575	8,816	420,231
Balance (in shares) at Mar. 31, 2020						22,665,000
Balance at Mar. 31, 2020						$ 36,408	38,367	328,475	6,452	409,702
Net income						0	0	13,368	0	13,368
Other comprehensive loss						0	0	0	2,364	2,364
Stock compensation expense						$ 0	976	0	0	976
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations (in shares)						2
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations						$ 8	96	(163)	0	(59)
Shares cancelled (in shares)						(0)
Shares cancelled						$ (1)	(14)	15	0	0
Shares cancelled (in shares)						0
Balance (in shares) at Jun. 30, 2020						22,667,000
Balance at Jun. 30, 2020						$ 36,415	39,425	335,575	8,816	420,231
Balance (in shares) at Dec. 31, 2020						22,692,000
Balance at Dec. 31, 2020						$ 36,500	41,886	353,574	8,741	440,701
Net income						0	0	22,710	0	22,710
Other comprehensive loss						0	0	0	(11,791)	(11,791)
Stock compensation expense						$ 0	849	0	0	849
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations (in shares)						89,000
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations						$ 296	4,144	(7,533)	0	(3,093)
Cash dividends declared						$ 0	0	(6,144)	0	(6,144)
Balance (in shares) at Mar. 31, 2021						22,781,000
Balance at Mar. 31, 2021						$ 36,796	46,879	362,607	(3,050)	443,232
Balance (in shares) at Dec. 31, 2020						22,692,000
Balance at Dec. 31, 2020						$ 36,500	41,886	353,574	8,741	440,701
Net income										26,894
Other comprehensive loss										(6,951)
Balance (in shares) at Jun. 30, 2021						26,588,000
Balance at Jun. 30, 2021						$ 49,471	240,200	359,628	1,790	651,089
Balance (in shares) at Mar. 31, 2021						22,781,000
Balance at Mar. 31, 2021						$ 36,796	46,879	362,607	(3,050)	443,232
Net income						0	0	4,184	0	4,184
Other comprehensive loss						0	0	0	4,840	4,840
Stock compensation expense						0	1,414	0	0	1,414
Stock issued for share-based awards, net of withholdings to satisfy employee tax obligations						(2)	(26)	(45)	0	(73)
Cash dividends declared						$ 0	0	(7,178)	0	(7,178)
Stock issued for KB acquisition (in shares)						3,808,000
Stock issued for KB acquisition						$ 12,682	191,988	0	0	204,670
Shares cancelled (in shares)						(1,000)
Shares cancelled						$ (5)	(55)	60	0	0
Shares cancelled (in shares)						1,000
Balance (in shares) at Jun. 30, 2021						26,588,000
Balance at Jun. 30, 2021						$ 49,471	$ 240,200	$ 359,628	$ 1,790	$ 651,089