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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2018
Summary of Significant Accounting Policies [Abstract]  
Schedule of Asset Classes and Related Estimated Useful Lives



 



 

Towers and related components

3 - 15  years

Furniture, equipment and vehicles

 2 - 7 years

Buildings and improvements

10 - 30  years



Allowance for Doubtful Accounts



 

 

 

 

 

 

 

 

 



 

 

 

 

 

 

 

 

 



 

For the year ended December 31,



 

2018

 

2017

 

2016



 

 

 

 

 

 

 

 

 



 

 

(in thousands)

Beginning balance

 

$

 26,481 

 

$

 24,518 

 

$

 1,681 

Provision for doubtful accounts

 

 

 551 

 

 

 2,909 

 

 

 22,516 

Write-offs, net of recoveries

 

 

 (591)

 

 

 (647)

 

 

 (614)

Currency translation adjustment

 

 

 (2,561)

 

 

 (299)

 

 

 935 

Ending balance

 

$

 23,880 

 

$

 26,481 

 

$

 24,518