Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Narrative (Details)

v3.19.1
Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]      
Trade receivables, allowance for doubtful accounts $ 3,759 $ 4,162  
Inventory 4,868 3,495  
Amortization of intangible assets $ 211,639 236,788 $ 246,753
Employee Stock Option      
Finite-Lived Intangible Assets [Line Items]      
Dividend rate 0.00%    
Subscriber Accounts      
Finite-Lived Intangible Assets [Line Items]      
Acquired finite-lived intangible assets, useful life 15 years    
Amortization rate using declining balance method 220.00%    
Amortization of intangible assets $ 204,130 226,697 236,673
Dealer Networks and Other Intangible Assets      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets $ 6,994 $ 9,830 $ 9,830
Finite-lived intangible asset, useful life 5 years    
LiveWatch Trademark      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 10 years    
Security Networks LLC and Certain Affiliated Entities | Subscriber Accounts      
Finite-Lived Intangible Assets [Line Items]      
Acquired finite-lived intangible assets, useful life 14 years    
Amortization rate using declining balance method 235.00%