Accounts Receivable, Net - Schedule of Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning of period balance			$ (3,864)
(Provision for) / recovery of expected credit losses	$ (100)	$ (100)	(357)	$ (616)
End of period balance	(3,766)		(3,766)
Alarm.com and Certain Subsidiaries
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning of period balance	(3,966)	(3,102)	(3,723)	(2,755)
(Provision for) / recovery of expected credit losses	(101)	19	(388)	(487)
Write-offs	390	115	434	274
End of period balance	(3,677)	(2,968)	(3,677)	(2,968)
All Other Subsidiaries
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning of period balance	(88)	(97)	(141)	(80)
(Provision for) / recovery of expected credit losses	(2)	(96)	31	(130)
Write-offs	1	2	21	19
End of period balance	$ (89)	$ (191)	$ (89)	$ (191)