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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2019
Property Plant And Equipment [Abstract]  
Property, Plant and Equipment

 


13. Property, Plant and Equipment

Property, plant and equipment as of December 31, 2019 and 2018 were as follows:

 

 

 

December 31,

 

 

 

2019

 

 

2018

 

(Dollars in millions)

 

 

 

 

 

 

 

 

Land

 

$

17.4

 

 

$

17.5

 

Buildings

 

 

90.6

 

 

 

65.1

 

Machinery and equipment

 

 

786.1

 

 

 

800.9

 

 

 

 

894.1

 

 

$

883.5

 

Less accumulated depreciation

 

 

478.7

 

 

 

465.6

 

Net

 

$

415.4

 

 

$

417.9

 

 

Depreciation expense, including impairment charges, for the years ended December 31, 2019, 2018 and 2017 amounted to $34.4 million, $31.6 million and $37.5 million, respectively.

Impairments – We did not incur impairment charges in 2019 or 2018. Impairment charges for 2017 were $3.7 million and were primarily related to the decision to discontinue naphthalene and coal tar distillation activities at CMC plants located in the United States.