Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands		Total	Common Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total Equity Attributable to Parent [Member]	Noncontrolling interest in consolidated subsidiary [Member]
Beginning Balance at Dec. 31, 2023		$ 265,796	$ 369	$ 263,310	$ 4,843	$ (3,209)	$ 265,313	$ 483
Beginning Balance,shares at Dec. 31, 2023			37,340,700
Net income		11,530			11,530		11,530
Dividends declared		(5,547)			(5,547)		(5,547)
Exercise of stock options		11		11			11
Exercise of stock options, shares			1,777
Employee stock purchase plan		55	$ 1	54			55
Employee stock purchase plan, shares			13,801
Stock compensation amortization		420		420			420
Dissolution of Minority Interest		(483)						$ (483)
Other comprehensive loss		(373)				(373)	(373)
Ending Balance at Jun. 30, 2024		271,409	$ 370	263,795	10,826	(3,582)	271,409
Ending Balance, Shares at Jun. 30, 2024			37,356,278
Beginning Balance at Mar. 31, 2024		268,243	$ 369	263,577	7,724	(3,427)
Beginning Balance,shares at Mar. 31, 2024			37,348,151
Net income		5,804			5,804
Dividends declared		(2,702)			(2,702)
Employee stock purchase plan		1	$ 1
Employee stock purchase plan, shares			8,127
Stock option expenses		218		218
Other comprehensive loss		(155)				(155)
Ending Balance at Jun. 30, 2024		271,409	$ 370	263,795	10,826	(3,582)	$ 271,409
Ending Balance, Shares at Jun. 30, 2024			37,356,278
Beginning Balance at Dec. 31, 2024		280,221	$ 370	264,449	19,947	(4,545)
Beginning Balance,shares at Dec. 31, 2024			37,370,917
Net income		22,730			22,730
Dividends declared		(5,570)			(5,570)
Issuance of common stock including proceeds from exercise of common stock compensation plans	[1]	73		73
Issuance of common stock including proceeds from exercise of common stock compensation plans , shares	[1]		55,945
Employee stock purchase plan		101		101
Employee stock purchase plan, shares			15,017
Stock compensation amortization		670		670
Other comprehensive loss		(227)				(227)
Ending Balance at Jun. 30, 2025		297,998	$ 370	265,293	37,107	(4,772)
Ending Balance, Shares at Jun. 30, 2025			37,441,879
Beginning Balance at Mar. 31, 2025		294,066	$ 370	264,871	32,507	(3,682)
Beginning Balance,shares at Mar. 31, 2025			37,377,342
Net income		7,387			7,387
Dividends declared		(2,787)			(2,787)
Issuance of common stock including proceeds from exercise of common stock compensation plans	[2]	73		73
Issuance of common stock including proceeds from exercise of common stock compensation plans , shares	[2]		55,945
Employee stock purchase plan		55		55
Employee stock purchase plan, shares			8,592
Stock compensation amortization		294		294
Other comprehensive loss		(1,090)				(1,090)
Ending Balance at Jun. 30, 2025		$ 297,998	$ 370	$ 265,293	$ 37,107	$ (4,772)
Ending Balance, Shares at Jun. 30, 2025			37,441,879

[1] Issuance of common stock includes 10,227 stock options and 45,718 restricted stock units which is net of shares held for tax purposes.

[2] Issuance of common stock includes 10,227 stock options and 45,718 restricted stock units which is net of shares held for tax purposes.