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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Cash flows from operating activities      
Net income for the year $ 46,361 $ 34,728 $ 26,572
Adjustments to reconcile net income to net cash from operating activities:      
Depreciation, amortization and impairment of goodwill and other intangibles 13,519 11,635 11,962
Gain from sale of subsidiary, net (Appendix A) (951)
Gains in respect of trading marketable securities (397) (115) (666)
Increase in liability for employee rights upon retirement 1,025 890 717
Share in losses (gains) of affiliated companies, net (8,520) 449 2,439
Deferred income taxes (516) (1,114) (85)
Capital gain on sale of property and equipment, net (1) (52) (31)
Decrease (increase) in accounts receivable (4,769) (4,552) 117
increase in other current and non-current assets (11,517) (5,033) (879)
Decrease (increase) in inventories 1,632 (1,424) (658)
Increase (decrease) in accounts payable 3,751 5,884 (1,176)
Increase (decrease) in deferred revenues 2,238 (1,122) (246)
Increase (decrease) in other current and non-current liabilities 1,101 1,298 (1,201)
Net cash provided by operating activities 43,907 41,472 35,914
Cash flows from investment activities      
Increase in funds in respect of employee rights upon retirement, net of withdrawals (844) (644) (804)
Capital expenditures (16,159) (13,645) (18,724)
Investment in affiliated company (900) (8,920) (5,966)
Investment in marketable securities (8,623) (3,154) (11)
Repayment of loans from affiliated companies 6,982 1,512
Proceeds from (Investment in) long - term deposit 450 16 (341)
Investments in other companies (1,274)
Proceeds from sale of property and equipment 315 342 406
Sale of marketable securities 5,368 4,633
Sale of subsidiary (Appendix A) (266)
Net cash used in investment activities (14,685) (19,860) (25,706)
Cash flows from financing activities      
Short term credit from banking institutions, net 23 (152) 160
Dividend paid (22,645) (17,088) (17,590)
Dividend paid to non-controlling interests (1,644) (994) (1,229)
Net cash used in financing activities (24,266) (18,234) (18,659)
Effect of exchange rate changes on cash and cash equivalents 863 693 (2,951)
Net increase (decrease) in cash and cash equivalents 5,819 4,071 (11,402)
Balance of cash and cash equivalents at beginning of year 31,087 27,016 38,418
Balance of cash and cash equivalents at end of year 36,906 31,087 27,016
Supplementary information on investing and financing activities not involving cash flows:      
Purchasing of property and equipment using a directly related liability 373 224  
Dividends declared 4,994 4,193 3,128
Working capital (excluding cash and cash equivalents), net     (1,797)
Receivables from Sale of Subsidiary     582
Funds in respect of employee rights upon retirement     250
Property and equipment, net     23
Liability for employee rights upon retirement     (275)
Gain from sale of subsidiary 951
Sale of subsidiary (266)
Supplementary disclosure of cash flow information      
Interest paid 2,651 324 203
Income taxes paid, net of refunds $ 22,891 $ 17,699 $ 10,181