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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Cash flows from operating activities:      
Net income $ 16,460 $ 15,266 $ 9,375
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 7,444 5,040 4,566
Interest expenses related to liabilities in connection with acquisitions 48 112 173
Accrued severance pay, net 8 143 11
Loss on sale of property and equipment 0 10 0
Stock-based compensation expenses 515 633 300
Amortization of marketable securities premium, accretion of discount 0 (14) (17)
Loss on sale and maturity of marketable securities 0 0 3
Gain on sale of subsidiary's operation (136) (136) (146)
Decrease (increase) in trade receivables, net 11 (5,405) (198)
Decrease (increase) in other long term and short term accounts receivable and prepaid expenses 145 (1,753) 241
Increase in trade payables 780 446 26
Increase (decrease) in accrued expenses and other accounts payable (2,279) 953 (288)
Increase (decrease) in deferred revenues (1,131) 1,593 (85)
Change in deferred income taxes, net 1,083 (1,650) 436
Net cash provided by operating activities 22,948 15,238 14,397
Cash flows from investing activities:      
Capitalized software development costs (4,969) (5,222) (3,595)
Purchase of property and equipment (510) (497) (583)
Cash paid in conjunction with acquisitions, net of acquired cash (7,627) (23,640) (10,225)
Proceeds from sale of subsidiary's operation 136 136 146
Proceeds from sale of property and equipment 0 0 414
Proceeds from sale of marketable securities 0 0 361
Proceeds from maturity of marketable securities 343 1,557 830
Investment in marketable securities 0 0 (393)
Prepayment on investment 0 0 (1,160)
Proceeds from short-term bank deposits 3,601 21,974 15,077
Change in loans to employees and other deposits ,net (34) 17 28
Investment in short-term bank deposit (1,366) (24,153) (1,291)
Net cash used in investing activities (10,426) (29,828) (391)
Cash flows from financing activities:      
Proceeds from exercise of options by employees 309 875 1,339
Issuance (expense on issuance) of Ordinary shares 0 (21) 20,290
Dividend paid (3,661) 0 (15,974)
Short-term credit, net 14 20 (717)
Purchase of non-controlling interest (87) (1,377) 0
Repayment of long-term loans 0 0 (23)
Net cash provided by (used in) financing activities (3,425) (503) 4,915
Effect of exchange rate changes on cash and cash equivalents (64) 143 390
Increase (decrease) in cash and cash equivalents 9,033 (14,950) 19,311
Cash and cash equivalents at the beginning of the year 28,711 43,661 24,350
Cash and cash equivalents at end of the year 37,744 28,711 43,661
Supplementary information on investing and financing activities not involving cash flows:      
Deferred acquisition payment 3,103 0 4,645
Contingent acquisition payment 1,192 750 414
Supplemental disclosure of cash flow activities:      
Income taxes 1,250 1,015 709
Interest $ 17 $ 8 $ 131