CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 62,491	$ 50,561
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	13,783	13,250
Deferred income taxes	21	(921)
Amortization of marketable security premiums	3,188	4,313
Changes in operating assets and liabilities:
Accounts receivable	(20,580)	(27,489)
Other receivables	20	(823)
Inventories	(22,437)	(34,012)
Prepaid expenses and other assets	(15,472)	5,886
Accounts payable and accrued liabilities	14,023	22,126
Income taxes payable	4,134	(446)
Postretirement health care benefits	(551)	(630)
Deferred compensation and other liabilities	986	(1,219)
Net cash provided by operating activities	39,606	30,596
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(19,458)	(17,552)
Purchases of trading securities	(1,526)	(1,292)
Sales of trading securities	574	2,567
Purchase of available for sale securities	(65,616)	(75,125)
Sale and maturity of available for sale securities	86,259	38,439
Net cash provided by (used in) investing activities	233	(52,963)
CASH FLOWS FROM FINANCING ACTIVITIES:
Shares purchased and retired	(27,550)	(8,024)
Dividends paid in cash	(18,825)	(18,438)
Proceeds from bank loans	2,922	3,240
Repayment of bank loans	(2,939)	(3,102)
Net cash used in financing activities	(46,392)	(26,324)
Effect of exchange rate changes on cash	598	13
Decrease in cash and cash equivalents	(5,955)	(48,678)
Cash, cash equivalents and restricted cash at beginning of year	53,635	106,226
Cash, cash equivalents and restricted cash at end of quarter	47,680	57,548
Supplemental cash flow information:
Income taxes paid/(received), net	15,524	15,580
Interest paid	187	36
Stock dividend issued	$ 86,433	$ 70,242