Summary of Significant Accounting Policies (Allowance for Doubtful Accounts) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) item	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	$ 15,693	$ 21,202	$ 23,880
Provision for doubtful accounts	440	620	155
Write-offs	(1,597)	(23)	(1,455)
Recoveries	(1,947)	(3,524)	(2,296)
Acquisitions			1,193
Currency translation adjustment	(454)	(2,582)	(275)
Ending balance	$ 12,135	$ 15,693	$ 21,202
Oi S.A. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage reduction in accounts receivable due to customer reorganization plan	10.00%
Number of annual installment payments | item	4