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Property and Equipment Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 243,698	$ 204,229
Accumulated depreciation and amortization	(79,119)	(68,233)
Property and equipment, net	164,579	135,996
Building and building improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	86,023	85,966
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	45,718	41,683
Aircraft and vehicles
Property, Plant and Equipment [Line Items]
Total property and equipment	25,329
Aircraft and vehicles
Property, Plant and Equipment [Line Items]
Total property and equipment		45
Land
Property, Plant and Equipment [Line Items]
Total property and equipment	23,762	23,762
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	15,015	8,289
Computer equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	14,440	13,549
Tooling
Property, Plant and Equipment [Line Items]
Total property and equipment	13,667	12,895
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	10,821	9,669
Demonstration units
Property, Plant and Equipment [Line Items]
Total property and equipment	489	448
Construction-in-progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 8,434	$ 7,923

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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+ References

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