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Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 100,912		$ 94,620
Property, Plant and Equipment, Net	48,145		43,521
Depreciation	1,953	$ 1,693
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(52,767)		(51,099)
Land
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,828		3,828
Building and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	24,042		24,038
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	475		429
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	24,465		24,764
Revenue-generating assets
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	34,880		28,453
Office and computer equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	13,171		13,057
Motor vehicles
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 51		$ 51

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
-Topic 360
-SubTopic 10
-Section 50
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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

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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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