Statements of Consolidated Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
OPERATING ACTIVITIES
Net income	$ 35,307	$ 37,111	$ 63,337
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	23,030	20,830	18,914
Provision for accounts receivable allowances	(119)	(875)	3,441
Provision for inventory reserves	3,065	4,498	8,081
Deferred income taxes	(1,176)	1,084	(2,232)
Share-based compensation expense	4,955	3,412	4,948
Pension termination expense	11,657	0	0
Loss (gain) on sale of property and equipment	8	(1,748)	(2,478)
Other, net	413	828	435
Changes in operating assets and liabilities
Accounts receivable	6,989	(8,710)	16,969
Inventories	(11,949)	6,784	(4,952)
Prepaid expenses	3,998	(3,988)	5,961
Trade accounts payable and accrued liabilities	10	8,602	2,302
Accrued income and other taxes	(1,270)	590	(937)
Contributions to company pension plan	(2,850)	0	(1,500)
Other, net	1,399	(938)	(4,647)
NET CASH PROVIDED BY OPERATING ACTIVITIES	73,467	67,480	107,642
INVESTING ACTIVITIES
Capital expenditures	(40,132)	(14,651)	(35,332)
Proceeds from the sale of property and equipment	273	3,454	2,631
Proceeds from sale of investments	1,679	1,993	0
Purchases of investments	(451)	(3,154)	0
Acquisition of businesses, net of cash	(4,746)	0	(12,089)
NET CASH USED IN INVESTING ACTIVITIES	(43,377)	(12,358)	(44,790)
FINANCING ACTIVITIES
(Payments) proceeds of notes payable to banks	(6,679)	860	(11,081)
Proceeds from long-term debt	22,207	96,410	169,172
Payments of long-term debt	(6,634)	(130,133)	(186,179)
Dividends paid	(4,118)	(4,076)	(4,106)
Proceeds from issuance of common shares	1,925	214	2,164
Stock incentive plan payments	(4,704)	0	0
Purchase of common shares for treasury	(1,049)	(226)	(728)
Purchase of common shares for treasury from related parties	(8,705)	(8,379)	(18,164)
Other	(1,474)	(2,473)	0
NET CASH USED IN FINANCING ACTIVITIES	(9,231)	(47,803)	(48,922)
Effects of exchange rate changes on cash, cash equivalents and restricted cash	5,286	(3,682)	2,438
Net increase in cash, cash equivalents and restricted cash	26,145	3,637	16,368
Cash, cash equivalents and restricted cash at beginning of year	57,244	53,607	37,239
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF YEAR	$ 83,389	$ 57,244	$ 53,607