CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 56,805	$ 80,654	$ 67,319
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	18,669	18,991	19,627
Deferred income taxes	2,063	(2,337)	199
Impairment of majority-owned foreign subsidiaries	1,126	2,371
Amortization of marketable security premiums	1,755	2,386	2,830
Changes in operating assets and liabilities:
Accounts receivable	(2,445)	(4,012)	6,869
Other receivables	2,220	(3,146)	473
Inventories	303	1,558	4,183
Prepaid expenses and other assets	9,489	(22,052)	2,999
Accounts payable and accrued liabilities	1,648	(557)	(2,061)
Income taxes payable	7,953	(11,899)	(5,797)
Postretirement health care benefits	(2,484)	(1,192)	(1,216)
Deferred compensation and other liabilities	3,827	(17,792)	3,125
Net cash provided by operating activities	100,929	42,973	98,550
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(27,612)	(16,673)	(16,090)
Purchases of trading securities	(4,378)	(5,089)	(4,569)
Sales of trading securities	1,255	22,396	1,433
Purchase of available for sale securities	(78,377)	(89,364)	(81,835)
Sale and maturity of available for sale securities	64,602	79,410	49,177
Net cash used in investing activities	(44,510)	(9,320)	(51,884)
CASH FLOWS FROM FINANCING ACTIVITIES:
Shares purchased and retired	(19,317)	(34,133)	(29,093)
Dividends paid in cash	(22,978)	(22,621)	(22,266)
Proceeds from bank loans	2,491	2,162	2,760
Repayment of bank loans	(2,549)	(2,289)	(2,788)
Net cash used in financing activities	(42,353)	(56,881)	(51,387)
Effect of exchange rate changes on cash	501	421	(2,292)
Increase (decrease) in cash and cash equivalents	14,567	(22,807)	(7,013)
Cash, cash equivalents, and restricted cash at beginning of year	96,720	119,527	126,540
Cash, cash equivalents, and restricted cash at end of year	111,287	96,720	119,527
Supplemental cash flow information:
Income taxes paid	5,676	18,854	36,365
Interest paid	112	68	34
Stock dividend issued	$ 60,538	$ 69,739	$ 61,671

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