SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Movement in valuation and qualifying accounts
Balance at Beginning of Year	$ 55,610	$ 17,108	$ 25,106
Purchase Price Accounting		41,941
Charged to Costs and Expenses	14,939	5,312	1,305
Deductions	19,697	8,751	9,303
Balance at End of Year	50,852	55,610	17,108
Valuation allowance on foreign tax credit carryforwards
Movement in valuation and qualifying accounts
Balance at Beginning of Year		4,180	10,577
Charged to Costs and Expenses	8,226
Deductions		4,180	6,397
Balance at End of Year	8,226		4,180
Valuation allowance on capital loss carryforwards
Movement in valuation and qualifying accounts
Charged to Costs and Expenses	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	41,908	1,672	1,500
Purchase Price Accounting		41,941
Charged to Costs and Expenses	839	217	172
Deductions	17,025	1,922
Balance at End of Year	25,722	41,908	1,672
Valuation allowance on state net operating losses
Movement in valuation and qualifying accounts
Balance at Beginning of Year	553	1,962	1,687
Charged to Costs and Expenses			275
Deductions	553	1,409
Balance at End of Year		553	1,962
Allowance for doubtful accounts
Movement in valuation and qualifying accounts
Balance at Beginning of Year	13,149	9,294	11,342
Charged to Costs and Expenses	3,993	5,095	858
Deductions	2,119	1,240	2,906
Balance at End of Year	$ 15,023	$ 13,149	$ 9,294