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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Property and Equipment
We compute depreciation using the straight-line method over estimated useful lives as follows:
Buildings and improvements
15 to 45 years
Leasehold improvements
Shorter of term of lease or useful life
Broadcast transmission towers and related equipment
15 to 35 years
Other broadcast and program production equipment
3 to 15 years
Computer hardware
3 to 5 years
Office and other equipment
3 to 10 years
Property and equipment consisted of the following:
 
 
As of December 31,
(in thousands)
 
2017
 
2016
 
 
 
 
 
Land and improvements
 
$
47,405

 
$
47,405

Buildings and improvements
 
139,685

 
137,013

Equipment
 
308,873

 
299,544

Computer software
 
14,658

 
14,578

Total
 
510,621

 
498,540

Accumulated depreciation
 
300,626

 
273,103

Net property and equipment
 
$
209,995

 
$
225,437