CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 45,274	$ 44,021
Adjustments to reconcile net earnings to net cash used in operating activities:
Depreciation	12,793	13,777
Deferred income taxes	(1,444)	(319)
Amortization of marketable security premiums	2,645	965
Changes in operating assets and liabilities:
Accounts receivable	(39,947)	(22,875)
Other receivables	(291)	281
Inventories	(12,440)	(13,001)
Prepaid expenses and other assets	3,980	2,742
Accounts payable and accrued liabilities	22,182	9,462
Income taxes payable	(83)	5,964
Postretirement health care benefits	(1,026)	(845)
Deferred compensation and other liabilities	510	(16,084)
Net cash provided by operating activities	32,153	24,088
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(22,930)	(11,425)
Repayment of premiums on split dollar life insurance policies	2,514
Purchases of trading securities	(2,108)	(2,718)
Sales of trading securities	582	17,673
Purchase of available for sale securities	(87,060)	(82,862)
Sale and maturity of available for sale securities	34,510	67,215
Net cash from (used in) investing activities	(74,492)	(12,117)
CASH FLOWS FROM FINANCING ACTIVITIES:
Shares purchased and retired	(30,184)	(23,505)
Dividends paid in cash	(18,100)	(17,850)
Proceeds from bank loans	2,970	3,048
Repayment of bank loans	(2,798)	(2,900)
Net cash used in financing activities	(48,112)	(41,207)
Effect of exchange rate changes on cash	(202)	(1,443)
Increase (Decrease) in cash and cash equivalents	(90,653)	(30,679)
Cash, cash equivalents and restricted cash at beginning of year	167,256	139,340
Cash, cash equivalents and restricted cash at end of quarter	76,603	108,661
Supplemental cash flow information:
Income taxes paid/(received), net	15,237	6,904
Interest paid	5	53
Stock dividend issued	$ 64,667	$ 63,402