CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 20,555	$ 19,358
Adjustments to reconcile net earnings to net cash used in operating activities:
Depreciation	8,757	9,219
Deferred income taxes	378	(568)
Amortization of marketable security premiums	1,644	557
Changes in operating assets and liabilities:
Accounts receivable	5,040	14,333
Other receivables	64	(1,208)
Inventories	(28,665)	(36,863)
Prepaid expenses and other assets	(1,260)	1,183
Accounts payable and accrued liabilities	7,388	40
Income taxes payable	(3,068)	5,033
Postretirement health care benefits	(690)	(573)
Deferred compensation and other liabilities	635	369
Net cash provided by operating activities	10,778	10,880
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(12,327)	(6,410)
Purchases of trading securities	(1,959)	(2,438)
Sales of trading securities	582	380
Purchase of available for sale securities	(58,154)	(53,269)
Sale and maturity of available for sale securities	19,798	44,466
Net cash from (used in) investing activities	(52,060)	(17,271)
CASH FLOWS FROM FINANCING ACTIVITIES:
Shares purchased and retired	(17,181)	(12,959)
Dividends paid in cash	(12,034)	(11,853)
Proceeds from bank loans	2,032	2,133
Repayment of bank loans	(1,847)	(2,019)
Net cash used in financing activities	(29,030)	(24,698)
Effect of exchange rate changes on cash	75	(1,582)
Increase (Decrease) in cash and cash equivalents	(70,237)	(32,671)
Cash, cash equivalents and restricted cash at beginning of year	167,256	139,340
Cash, cash equivalents and restricted cash at end of quarter	97,019	106,669
Supplemental cash flow information:
Income taxes paid/(received), net	13,120	1,035
Interest paid	4	49
Stock dividend issued	$ 64,667	$ 63,402