CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 15,835	$ 13,394
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	4,580	4,599
Deferred income taxes	(345)	10
Amortization of marketable security premiums	642	1,185
Changes in operating assets and liabilities:
Accounts receivable	11,378	(360)
Other receivables	2,626	645
Inventories	(13,262)	(24,432)
Prepaid expenses and other assets	(250)	1,033
Accounts payable and accrued liabilities	(3,414)	(4,845)
Income taxes payable	3,797	1,536
Postretirement health care benefits	(152)	(201)
Deferred compensation and other liabilities	(34)	(46)
Net cash provided by (used in) operating activities	21,401	(7,482)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(4,494)	(5,049)
Purchases of trading securities	(1,296)	(1,010)
Sales of trading securities	430	528
Purchase of available for sale securities	(27,297)	(14,848)
Sale and maturity of available for sale securities	12,655	25,874
Net cash (used in) provided by investing activities	(20,002)	5,495
CASH FLOWS FROM FINANCING ACTIVITIES:
Shares purchased and retired		(1,604)
Dividends paid in cash	(12,491)	(12,291)
Proceeds from bank loans	1,039	1,110
Repayment of bank loans	(1,055)	(1,115)
Net cash used in financing activities	(12,507)	(13,900)
Effect of exchange rate changes on cash	71	613
Increase (decrease) in cash and cash equivalents	(11,037)	(15,274)
Cash, cash equivalents and restricted cash at beginning of year	76,290	53,635
Cash, cash equivalents and restricted cash at end of year	65,253	38,361
Supplemental cash flow information:
Income taxes paid/(received), net	565	2,303
Interest paid	66	58
Stock dividend issued	$ 66,243	$ 86,433