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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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