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VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Allowance for Doubtful Accounts [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period $ 1,523 $ 1,306 $ 1,409
Charged to Costs and Expenses 1,989 1,053 750
Removal of Uncollectible Receivables (924) (830) (799)
Translation Adjustments Increase (Decrease) (135) (6) (54)
Balance at the End of Period 2,453 1,523 1,306
Valuation Allowance of Deferred Tax Assets [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 248,867 247,967 175,218
Charged to Costs and Expenses (230,358) 6,605 3,565
Other 4,108 (6,032) 73,390
Translation Adjustments Increase (Decrease) (3,585) 327 (4,206)
Balance at the End of Period $ 19,032 $ 248,867 $ 247,967