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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Trading gains | $ 666,000 | $ 133,000 |  |
Allowance for doubtful accounts receivable | 2,063,000 | 2,391,000 |  |
Intangible asset impairment loss | 255,000 |  |  |
Goodwill | 3,356,000 | 4,041,000 | $ 5,433,000 | [1]
Goodwill impairment loss | 674,000 | 879,000 | 3,093,000 |
Severance expenses | 1,386,000 | 1,460,000 | 882,000 |
Advertising expenses | $ 6,800,000 | 6,700,000 | $ 7,600,000 |
Deferred expenses amortization period | 20 months |  |  |
Investment impairment loss | $ 0 | 0 |  |
Antidilutive shares | 0 |  |  |
Minimum [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Ownership percentage, equity method | 20.00% |  |  |
Maximum [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Ownership percentage, equity method | 50.00% |  |  |
Certain Reporting Units [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Goodwill | $ 700,000 |  |  |
Goodwill impairment loss | 700,000 |  |  |
Goodwill, fair value | $ 0 |  |  |
Certain Reporting Unit One [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Goodwill |  | 1,500,000 |  |
Goodwill impairment loss |  | 900,000 |  |
Goodwill, fair value |  | $ 700,000 |  |
[1] | The accumulated amount of impairment loss as of December 31, 2013, December 31, 2014 and December 31, 2015 was US$ 5,545,000, US$ 6,424,000 and US$ 7,098,000, respectively.

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