CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 71,218	$ 64,302
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	14,051	13,717
Deferred income taxes	43	(883)
Amortization (accretion) of marketable security premiums / discounts, net	(4,832)	1,560
Changes in operating assets and liabilities:
Accounts receivable	(28,375)	(18,459)
Other receivables	769	4,118
Inventories	(17,381)	(1,132)
Prepaid expenses and other assets	5,809	3,581
Accounts payable and accrued liabilities	11,915	10,256
Income taxes payable	5,431	(7,719)
Postretirement health care benefits	(656)	(488)
Deferred compensation and other liabilities	(704)	1,249
Net cash provided by (used in) operating activities	57,288	70,102
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(21,914)	(13,911)
Purchases of trading securities	(2,006)	(1,934)
Sales of trading securities	2,070	482
Purchase of available for sale securities	(116,790)	(82,391)
Sale and maturity of available for sale securities	46,797	65,578
Net cash provided by (used in) investing activities	(91,843)	(32,176)
CASH FLOWS FROM FINANCING ACTIVITIES:
Shares purchased and retired	(6,483)	(2,196)
Dividends paid in cash	(19,497)	(19,062)
Proceeds from bank loans	2,297	2,885
Repayment of bank loans	(2,297)	(2,908)
Net cash provided by (used in) financing activities	(25,980)	(21,281)
Effect of exchange rate changes on cash	635	(846)
Increase (decrease) in cash and cash equivalents	(59,900)	15,799
Cash, cash equivalents and restricted cash at beginning of year	139,193	76,290
Cash, cash equivalents and restricted cash at end of quarter	79,293	92,089
Supplemental cash flow information:
Income taxes paid, net	21,539	26,861
Interest paid	163	204
Stock dividend issued	$ 66,289	$ 66,243