Quarterly report pursuant to Section 13 or 15(d)

Goodwill - Narrative (Details)

v3.20.2
Goodwill - Narrative (Details)
$ in Thousands
1 Months Ended 8 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
Aug. 31, 2019
USD ($)
Sep. 30, 2020
USD ($)
reporting_unit
Goodwill [Line Items]      
Number of reporting units | reporting_unit     1
Goodwill impairment $ 0 $ 0 $ 81,943
Brinks Home Security | Valuation technique, discounted cash flow | COVID-19 Pandemic      
Goodwill [Line Items]      
Goodwill impairment     $ 81,943