SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Movement in valuation and qualifying accounts
Balance at Beginning of Year	$ 47,904	$ 50,852	$ 55,610
Charged to Costs and Expenses	16,627	904	14,939
Deductions	12,401	3,852	19,697
Balance at End of Year	52,130	47,904	50,852
Valuation allowance on foreign tax credit carryforwards
Movement in valuation and qualifying accounts
Balance at Beginning of Year		8,226
Charged to Costs and Expenses		(8,226)	8,226
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	31,442	25,722	41,908
Charged to Costs and Expenses	10,811	5,877	839
Deductions	2,847	157	17,025
Balance at End of Year	39,406	31,442	25,722
Valuation allowance on state net operating losses
Movement in valuation and qualifying accounts
Balance at Beginning of Year			553
Deductions			553
Allowance for doubtful accounts
Movement in valuation and qualifying accounts
Balance at Beginning of Year	16,462	15,023	13,149
Charged to Costs and Expenses	5,816	5,134	3,993
Deductions	9,554	3,695	2,119
Balance at End of Year	$ 12,724	$ 16,462	$ 15,023