Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment

v3.10.0.1
Property, Plant and Equipment
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
8. Property, Plant and Equipment
Property, plant and equipment balances, including assets under capital lease, were as follows:
 
As of December 31,
 
Useful Life
(in years)
(in millions)
2018
 
2017
 
Land improvements
$
4.4

 
$
3.6

 
12 - 20
Buildings and building improvements
32.6

 
29.9

 
20 - 50
Machinery and equipment
195.2

 
175.3

 
3 - 12
Leasehold improvements
2.1

 
1.7

 
 
Construction-in-process
11.3

 
11.4

 
 
Gross property, plant and equipment
245.6

 
221.9

 
 
Accumulated depreciation
(97.8
)
 
(79.0
)
 
 
Property, plant and equipment, net
$
147.8

 
$
142.9

 
 

Leasehold improvements are amortized over the lesser of their useful lives or the remaining lease term.
We capitalized interest relating to the construction of long-term assets in the amount of $0.1 million in 2018, $0.1 million in 2017 and $1.1 million in 2016.
As of December 31, 2018, assets recorded under capital lease obligations totaled $8.1 million and related accumulated depreciation totaled $6.0 million. As of December 31, 2017, assets recorded under capital lease obligations totaled $7.6 million and related accumulated depreciation totaled $4.3 million. Interest recorded on capital lease obligations is included in interest expense in the accompanying consolidated statements of operations.