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Business Combination Business Combination - Purchase Price Allocation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Business Acquisition [Line Items]        
Goodwill, Acquired During Period [1]   $ 12,564    
Goodwill   43,116 $ 30,739 $ 31,000
Less: Contingent consideration   $ (11,751) $ 0  
Minimum [Member]        
Business Acquisition [Line Items]        
Intangible asset, estimated useful life   1 year    
Maximum [Member]        
Business Acquisition [Line Items]        
Intangible asset, estimated useful life   15 years    
Developed Technology [Member] | Minimum [Member]        
Business Acquisition [Line Items]        
Intangible asset, estimated useful life   5 years    
Developed Technology [Member] | Maximum [Member]        
Business Acquisition [Line Items]        
Intangible asset, estimated useful life   15 years    
Customer Relationships [Member] | Minimum [Member]        
Business Acquisition [Line Items]        
Intangible asset, estimated useful life   10 years    
Customer Relationships [Member] | Maximum [Member]        
Business Acquisition [Line Items]        
Intangible asset, estimated useful life   15 years    
Ecolink Intelligent Technology, Inc. [Member]        
Business Acquisition [Line Items]        
Cash and cash equivalents   $ 685    
Accounts receivable   374    
Inventories   1,412    
Prepaid expenses and other current assets   253    
Property, plant and equipment   16    
Non-interest bearing liabilities   (1,557)    
Net tangible assets acquired   1,183    
Total purchase price   24,527    
Noncontrolling interest   (378)    
Net purchase price   24,149    
Less: Contingent consideration   (11,200)    
Cash paid   $ 12,949    
Ecolink Intelligent Technology, Inc. [Member] | Minimum [Member]        
Business Acquisition [Line Items]        
Property, plant and equipment, estimated useful life   1 year    
Ecolink Intelligent Technology, Inc. [Member] | Maximum [Member]        
Business Acquisition [Line Items]        
Property, plant and equipment, estimated useful life   4 years    
Ecolink Intelligent Technology, Inc. [Member] | Trade Names [Member]        
Business Acquisition [Line Items]        
Intangible assets $ 400 $ 400    
Intangible asset, estimated useful life 7 years 7 years    
Ecolink Intelligent Technology, Inc. [Member] | Developed Technology [Member]        
Business Acquisition [Line Items]        
Intangible assets $ 9,100 $ 9,080    
Ecolink Intelligent Technology, Inc. [Member] | Developed Technology [Member] | Minimum [Member]        
Business Acquisition [Line Items]        
Intangible asset, estimated useful life   4 years    
Ecolink Intelligent Technology, Inc. [Member] | Developed Technology [Member] | Maximum [Member]        
Business Acquisition [Line Items]        
Intangible asset, estimated useful life   14 years    
Ecolink Intelligent Technology, Inc. [Member] | Customer Relationships [Member]        
Business Acquisition [Line Items]        
Intangible assets $ 1,300 $ 1,300    
Intangible asset, estimated useful life 5 years 5 years    
[1] During 2015, we recognized $12.6 million of goodwill related to the Ecolink Intelligent Technology, Inc. acquisition. Please refer to Note 21 for further information about this acquisition.