Property, Plant and Equipment, Net - Schedule of Components (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment, Net
Property, plant and equipment, net	$ 328,909	$ 313,418
Land and land improvements
Property, Plant and Equipment, Net
Property, plant, and equipment, gross	17,578	17,846
Buildings and leasehold improvements
Property, Plant and Equipment, Net
Property, plant, and equipment, gross	113,632	106,316
Furniture and equipment
Property, Plant and Equipment, Net
Property, plant, and equipment, gross	225,203	202,897
Property, plant and equipment in service, net
Property, Plant and Equipment, Net
Property, plant, and equipment, gross	356,413	327,059
Accumulated depreciation	(143,750)	(130,814)
Property, plant and equipment, net	212,663	196,245
Construction in progress
Property, Plant and Equipment, Net
Property, plant and equipment, net	$ 116,246	$ 117,173

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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