Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net earnings	$ 41,460,000	$ 34,559,000	$ 20,699,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Provision for depreciation	3,531,000	4,372,000	2,765,000
Intangibles amortization	1,515,000	1,635,000	582,000
Deferred income tax (benefit)	(4,528,000)	(1,190,000)	(2,311,000)
Provision for doubtful notes and credit losses	(285,000)	285,000	0
(Gain) loss on disposal of property, plant and equipment		(7,000)	463,000
Loss on impairment	0	0	5,295,000
Proceeds from insurance claim	0	0	151,000
Noncash retirement plan expense	904,000	863,000	803,000
Gain on bargain purchase	0	0	(492,000)
Gain on sale of subsidiary	0	(351,000)	0
Other	856,000	591,000	514,000
Accounts receivable, net	(13,277,000)	20,337,000	(12,903,000)
Inventories	(87,579,000)	(38,627,000)	(5,620,000)
Other assets and current assets	2,122,000	2,137,000	147,000
Accounts payable and accrued liabilities	390,000	18,288,000	(676,000)
Federal and state income taxes payable	1,465,000	2,497,000	(649,000)
Net cash provided by (used in) operating activities	(53,426,000)	45,389,000	8,768,000
Cash flows from investing activities:
Marketable securities purchased	(5,432,000)	(47,709,000)	(20,024,000)
Marketable securities - maturities and sales	26,891,000	46,243,000	29,195,000
Purchase of property, plant and equipment	(7,531,000)	(1,840,000)	(1,030,000)
Proceeds from notes receivable	1,037,000	627,000	106,000
Acquisition of businesses, net of cash acquired	0	0	(24,683,000)
Proceeds from sale of subsidiary	0	2,000,000	0
Proceeds from insurance claim	0	232,000	0
Net cash provided by (used in) investing activities	14,965,000	(447,000)	(16,436,000)
Cash flows from financing activities:
Proceeds from line of credit	8,000,000	0	0
Payments on line of credit	(8,000,000)	0	0
Dividends paid	(32,029,000)	(28,385,000)	(31,826,000)
Proceeds from sale of treasury stock	513,000	429,000	436,000
Other	(17,000)	(40,000)	(36,000)
Net cash used in financing activities	(31,533,000)	(27,996,000)	(31,426,000)
Net increase (decrease) in cash and cash equivalents	(69,994,000)	16,946,000	(39,094,000)
Cash and cash equivalents at beginning of year	87,657,000	70,711,000	109,805,000
Cash and cash equivalents at end of year	17,663,000	87,657,000	70,711,000
Supplemental disclosures of cash flow information:
Income taxes	11,963,000	6,843,000	8,208,000
Interest on line of credit	$ 2,000	$ 0	$ 0