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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Cash flows from operating activities:      
Net income (loss) $ (5,850) $ 30,619 $ 1,878
Adjustments required to reconcile net income (loss) to net cash provided by (used in) operating activities:      
Depreciation and amortization 24,121 14,794 14,509
Impairment of goodwill and other charges 18,043      
Gain from redemption of convertible subordinated notes       (78)
Gain from the sale of investment accounted for at cost (3,034) (24,314) (2,597)
Stock-based compensation of options and RSUs related to employees and non- employees 2,009 1,726 937
Accrued severance pay, net (285) (135) (1,113)
Accrued interest and exchange rate differences on short and long-term restricted cash, net 500 (201) 256
Accrued interest, accretion of discounts and exchange rate differences on held-to-maturity marketable securities and short-term bank deposits, net    (45) (349)
Exchange rate differences on long-term loans (112) (415) 212
Capital loss from disposal of property and equipment 286 270 163
Deferred income taxes (428) (250) 992
Decrease (increase) in trade receivables, net 646 (1,562) 14,294
Decrease (increase) in other assets (including short-term, long-term and deferred charges) (21,062) (5,545) 6,564
Decrease (increase) in inventories (4,889) (2,946) 8,995
Increase (decrease) in trade payables 7,066 (4,759) (6,855)
Increase (decrease) in accrued expenses 11 2,256 (6,034)
Increase (decrease) in advances from customers held by trustees, net 547 (1,133) (22,032)
Increase (decrease) in other accounts payable and other long-term liabilities (8,972) 4,574 (9,909)
Net cash provided by (used in) operating activities 8,597 12,934 (167)
Cash flows from investing activities:      
Purchase of property and equipment (8,948) (7,638) (4,485)
Proceeds from sale of investment accounted for at cost 3,034 24,314 2,597
Purchase of held-to-maturity marketable securities and deposits    (30,693) (130,961)
Proceeds from held-to-maturity marketable securities and deposits    62,384 162,615
Purchase of available-for-sale marketable securities    (4,804)   
Proceeds from available-for-sale marketable securities    4,888   
Investment in restricted cash (including long-term) (23,548) (2,941) (90)
Proceeds from restricted cash (including long-term) 23,014 1,339 7,696
Proceeds from working capital adjustment to subsidiary purchase price 1,465      
Investment in restricted cash held by trustees (11,737) (12,346) (3,056)
Proceeds from restricted cash held by trustees 10,660 13,673 24,834
Acquisitions of subsidiaries, net of cash acquired (1,867) (153,883)   
Purchase of intangible assets (38) (2,515)   
Net cash provided by (used in) investing activities (7,965) (108,222) 59,150
Cash flows from financing activities:      
Exercise of stock options and issuance of restricted share units 27 39 11
Early redemption of convertible notes       (170)
Repayment of convertible debt (835) (839)   
Short-term bank credit, net 842 (946) (6,500)
Proceeds from long-term loans    40,000   
Repayment of long-term loans (1,225) (8,409) (4,350)
Net cash provided by (used in) financing activities (1,191) 29,845 (11,009)
Effect of exchange rate changes on cash and cash equivalents (448) 9 782
Increase (decrease) in cash and cash equivalents (1,007) (65,434) 48,756
Cash and cash equivalents at the beginning of the year 57,238 122,672 73,916
Cash and cash equivalents at the end of the year 56,231 57,238 122,672
Cash paid during the year for:      
Interest 2,306 1,334 1,546
Income taxes 672 400 698
Non-cash transactions:      
Conversion of long-term convertible subordinated notes 9 1 10
Classification from inventories to property and equipment 1,997 717 806
Classification from property and equipment to inventories 110 128 2,497
Raysat Antenna Systems [Member]
      
Cash flows from investing activities:      
Acquisitions of subsidiaries, net of cash acquired   (26,317)  
Estimated fair value of assets acquired and liabilities assumed at the acquisition date:      
Working capital (excluding cash and cash equivalents)   (4,727)  
Property and equipment, net   3,147  
Intangible assets   9,778  
Other non-current assets   2,144  
Goodwill   20,162  
Long-term liabilities   (3,436)  
Net assets acquired (liabilities) assumed   27,068  
Deferred Payment   (751)  
Wavestream Corporation [Member]
      
Cash flows from investing activities:      
Acquisitions of subsidiaries, net of cash acquired   (127,566)  
Estimated fair value of assets acquired and liabilities assumed at the acquisition date:      
Working capital (excluding cash and cash equivalents)   4,816  
Property and equipment, net   3,513  
Intangible assets   43,568  
Other non-current assets   355  
Goodwill   85,920  
Long-term liabilities   (9,097)  
Net assets acquired (liabilities) assumed   129,075  
Contingent consideration   (1,509)  
Cicat Networks, Inc. [Member]
      
Cash flows from investing activities:      
Acquisitions of subsidiaries, net of cash acquired (1,867)    
Estimated fair value of assets acquired and liabilities assumed at the acquisition date:      
Working capital (excluding cash and cash equivalents) 226    
Property and equipment, net 42    
Intangible assets 720    
Other non-current assets 209    
Goodwill 1,890    
Long-term liabilities (398)    
Contingent consideration $ (822)