Annual report pursuant to Section 13 and 15(d)

Variable Interest Entity - Narrative (Details)

v3.20.4
Variable Interest Entity - Narrative (Details)
contract in Thousands
Dec. 23, 2020
USD ($)
contract
month
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Variable Interest Entity [Line Items]      
Gain or loss generated as a result of the initial consolidation $ 0    
Assets   $ 1,346,663,000 $ 1,419,312,000
GSSA | Variable Interest Entity, Primary Beneficiary      
Variable Interest Entity [Line Items]      
Assets   35,171,000  
GSSA | Variable Interest Entity, Primary Beneficiary | Subscriber Accounts      
Variable Interest Entity [Line Items]      
Intangible assets   $ 35,148,000  
Assets Acquired from Kourt Security Partners, LLC | GSSA      
Variable Interest Entity [Line Items]      
Number of alarm monitoring contracts acquired | contract 40    
Upfront payment $ 10,914,000    
Earn out period 50 months    
Final month title to all monitoring contracts transferred | month 50    
Period after the close that transition services will be received 90 days    
Fair value of net assets acquired $ 42,214,000