CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 12,019	$ 10,763
Adjustments to reconcile net earnings to net cash used in operating activities:
Depreciation	4,216	4,365
Deferred income taxes	208	174
Amortization of marketable security premiums	1,334	739
Changes in operating assets and liabilities:
Accounts receivable	3,092	6,326
Other receivables	(239)	487
Inventories	(12,051)	(8,883)
Prepaid expenses and other assets	1,829	572
Accounts payable and accrued liabilities	4,296	(1,204)
Income taxes payable	2,213	2,295
Postretirement health care benefits	(209)	(347)
Deferred compensation and other liabilities	99	50
Net cash provided by operating activities	16,807	15,337
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(5,948)	(3,787)
Purchases of trading securities	(737)	(1,835)
Sales of trading securities	205	582
Purchase of available for sale securities	(25,148)	(30,031)
Sale and maturity of available for sale securities	8,524	8,543
Net cash from (used in) investing activities	(23,104)	(26,528)
CASH FLOWS FROM FINANCING ACTIVITIES:
Shares purchased and retired	(1,152)	(7,423)
Dividends paid in cash	(12,075)	(11,874)
Proceeds from bank loans	1,178	1,070
Repayment of bank loans	(1,016)	(896)
Net cash used in financing activities	(13,065)	(19,123)
Effect of exchange rate changes on cash	313	(252)
Increase (Decrease) in cash and cash equivalents	(19,049)	(30,566)
Cash, cash equivalents and restricted cash at beginning of year	106,226	167,256
Cash, cash equivalents and restricted cash at end of quarter	87,177	136,690
Supplemental cash flow information:
Income taxes paid/(received), net	1,571	1,233
Interest paid	2	2
Stock dividend issued	$ 70,242	$ 64,667