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Properties and Equipment - Summary of Properties and Equipment (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Abstract]    
Land $ 3.7 $ 0.2
Buildings and improvements 34.7 26.0
Machinery and equipment 130.6 118.0
Total property and equipment, at cost 169.0 144.2
Less: Accumulated depreciation 108.9 101.3
Properties and equipment, net $ 60.1 [1] $ 42.9
[1] Amounts at December 31, 2017 include properties and equipment acquired in the TBEI acquisition - see Note 2 – Acquisitions.