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SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Changes in valuation and qualifying accounts      
Removal of tax valuation allowance for expiration of net operating loss carryforwards $ 3,000 $ 35,600  
Removal of tax valuation allowance for Utilization of foreign tax credits 27,000    
Allowance for Doubtful Accounts [Member]      
Changes in valuation and qualifying accounts      
Balance at beginning of period 10,877 11,063 $ 10,796
Charged (credited) to costs and expenses $ 103 $ 49 $ (75)
Credited to other accounts
(Deductions) Adjustments [1] $ (6,416) $ (235) $ 342
Balance at end of period $ 4,564 $ 10,877 $ 11,063
Allowance for Doubtful Accounts [Member] | IPTV divestiture [Member]      
Changes in valuation and qualifying accounts      
(Deductions) Adjustments
Tax valuation allowance [Member]      
Changes in valuation and qualifying accounts      
Balance at beginning of period $ 368,672 $ 422,789 $ 418,285
Charged (credited) to costs and expenses 13,161 1,824 36,324
Credited to other accounts $ (54,509) [2] $ (55,941) [3] $ (31,820)
(Deductions) Adjustments [1] [1]
Balance at end of period $ 327,324 $ 368,672 $ 422,789
Tax valuation allowance [Member] | IPTV divestiture [Member]      
Changes in valuation and qualifying accounts      
(Deductions) Adjustments
[1] Represents write-offs of allowance for doubtful accounts and foreign exchange adjustments.
[2] Includes $3 million removal of tax valuation allowance for expiration of net operating loss carryforwards in China and $27 million for utilization of foreign tax credits in US
[3] Includes $35.6 million removal of tax valuation allowance for expiration of net operating loss carryforwards in China.