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SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Movement in valuation and qualifying accounts      
Balance at Beginning of Year $ 50,852 $ 55,610 $ 17,108
Purchase Price Accounting     41,941
Charged to Costs and Expenses 904 14,939 5,312
Deductions 3,852 19,697 8,751
Balance at End of Year 47,904 50,852 55,610
Valuation allowance on foreign tax credit carryforwards      
Movement in valuation and qualifying accounts      
Balance at Beginning of Year 8,226   4,180
Charged to Costs and Expenses (8,226) 8,226  
Deductions     4,180
Balance at End of Year   8,226  
Valuation allowance on capital loss carryforwards      
Movement in valuation and qualifying accounts      
Balance at Beginning of Year 1,881    
Charged to Costs and Expenses (1,881) 1,881  
Balance at End of Year   1,881  
Valuation allowance on foreign net operating losses and other deferred taxes      
Movement in valuation and qualifying accounts      
Balance at Beginning of Year 25,722 41,908 1,672
Purchase Price Accounting     41,941
Charged to Costs and Expenses 5,877 839 217
Deductions 157 17,025 1,922
Balance at End of Year 31,442 25,722 41,908
Valuation allowance on state net operating losses      
Movement in valuation and qualifying accounts      
Balance at Beginning of Year   553 1,962
Deductions   553 1,409
Balance at End of Year     553
Allowance for doubtful accounts      
Movement in valuation and qualifying accounts      
Balance at Beginning of Year 15,023 13,149 9,294
Charged to Costs and Expenses 5,134 3,993 5,095
Deductions 3,695 2,119 1,240
Balance at End of Year $ 16,462 $ 15,023 $ 13,149