Quarterly report pursuant to Section 13 or 15(d)

Goodwill - Schedule of Goodwill (Details)

v3.10.0.1
Goodwill - Schedule of Goodwill (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Goodwill [Roll Forward]        
Beginning Balance     $ 563,549,000  
Goodwill impairment $ (214,400,000) $ 0 (214,400,000) $ 0
Reporting unit reallocation     0  
Ending Balance 349,149,000   349,149,000  
MONI        
Goodwill [Roll Forward]        
Beginning Balance     527,502,000  
Goodwill impairment     (214,400,000)  
Reporting unit reallocation     (313,102,000)  
Ending Balance 0   0  
LiveWatch        
Goodwill [Roll Forward]        
Beginning Balance     36,047,000  
Goodwill impairment     0  
Reporting unit reallocation     (36,047,000)  
Ending Balance 0   0  
Brinks Home Security        
Goodwill [Roll Forward]        
Beginning Balance     0  
Goodwill impairment     0  
Reporting unit reallocation     349,149,000  
Ending Balance $ 349,149,000   $ 349,149,000