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ACCOUNTS RECEIVABLE (SCHEDULE OF CHANGE IN ALLOWANCE) (DETAILS) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
ACCOUNTS RECEIVABLE AND SIGNIFICANT CLIENTS [Abstract]      
Balance, beginning of year $ 3,559 $ 6,306 $ 5,580
Provision for doubtful accounts 368 363 600
Uncollectible receivables written-off (209) (2,868) (67)
Effect of foreign currency (83) (242) 193
Balance, end of year $ 3,635 $ 3,559 $ 6,306