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Property and Equipment
12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Property and Equipment
Property and Equipment
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