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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash flows from operating activities:      
Net income $ 16,708 $ 17,076 $ 16,566
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 11,608 9,885 8,660
Stock-based compensation 152 234 1,557
Amortization of marketable securities premium and accretion of discount 257 249 62
Increase in trade receivables, net (2,571) (8,756) (9,378)
Increase in other long term and short term accounts receivable and prepaid expenses (40) (1,669) (23)
Increase (decrease) in trade payables 1,426 1,866 (342)
Increase (decrease) in accrued expenses and other accounts payable 1,553 (196) (303)
Increase (decrease) in deferred revenues (180) 684 191
Change in deferred taxes, net (958) 245 1,204
Net cash provided by operating activities 27,955 19,618 18,194
Cash flows from investing activities:      
Capitalized software development costs (4,224) (3,847) (4,267)
Purchase of property and equipment (799) (1,109) (993)
Cash paid in conjunction with acquisitions, net of acquired cash (31,436) (9,182) (9,363)
Proceeds from maturity of marketable securities 2,643 0 596
Proceeds from short-term bank deposits 8,467 2,654 0
Investment in marketable securities and short-term bank deposits (9,401) (5,153) (11,976)
Short term loan to a related-party (1,183) 0 0
Change in loans to employees and other deposits, net (49) 5 (58)
Net cash used in investing activities (35,982) (16,632) (26,061)
Cash flows from financing activities:      
Proceeds from exercise of options by employees 41 419 204
Issuance of Ordinary shares, net 0 0 54,726
Dividend paid (7,761) (7,788) (8,681)
Dividend paid to non-controlling interests (456) (392) 0
Dividend paid to redeemable non-controlling interests (1,574) 0 0
Short-term credit, net 936 (2,840) 2,974
Purchase of non-controlling interest (352) (1,300) 0
Long term loan received 31,356 0 0
Repayment of long-term loans 0 (34) (2,905)
Net cash provided by (used in) financing activities 22,190 (11,935) 46,318
Effect of exchange rate changes on cash and cash equivalents (1,037) (1,378) (1,070)
Increase (decrease) in cash and cash equivalents 13,126 (10,327) 37,381
Cash and cash equivalents at the beginning of the year 62,188 72,515 35,134
Cash and cash equivalents at end of the year 75,314 62,188 72,515
Supplemental disclosure of cash flow activities:      
Income taxes 4,510 2,386 1,601
Interest $ 358 $ 113 $ 74