SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Movement in valuation and qualifying accounts
Balance at Beginning of Year	$ 52,130	$ 47,904	$ 50,852
Charged to Costs and Expenses	5,785	16,627	904
Deductions	14,780	12,401	3,852
Balance at End of Year	43,135	52,130	47,904
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)
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)
Valuation allowance on foreign net operating losses and other deferred taxes
Movement in valuation and qualifying accounts
Balance at Beginning of Year	39,406	31,442	25,722
Charged to Costs and Expenses	775	10,811	5,877
Deductions	9,167	2,847	157
Balance at End of Year	31,014	39,406	31,442
Allowance for credit losses
Movement in valuation and qualifying accounts
Balance at Beginning of Year	12,724	16,462	15,023
Charged to Costs and Expenses	5,010	5,816	5,134
Deductions	5,613	9,554	3,695
Balance at End of Year	$ 12,121	$ 12,724	$ 16,462