Guarantor and Non-Guarantor Supplemental Financial Information - Cash Flows (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net cash used in operating activities	$ (130,990)	$ (130,989)
Cash flows from investing activities:
Capital expenditures	(4,653)	(12,193)
Proceeds from the sale of capital assets	19	225
Proceeds from sales of equity securities	5,430	0
Investment in subsidiary	0	0
Acquisition of intangible assets	(668)	(1,022)
Proceeds from the sale of intangible assets	0	53,693
Net cash provided by investing activities	128	40,703
Cash flows from financing activities:
Proceeds from notes payable	225,000	0
Repayment of notes payable	(229,050)	0
Borrowings from revolving credit facility	160,000	179,000
Repayments on revolving credit facility	(26,000)	(79,000)
Proceeds from capital contribution	0	0
Repayments of finance lease obligations	(4,263)	(6,955)
Deferred financing costs	(4,036)	0
Return of capital	(441)	(2,049)
Net cash provided by financing activities	121,210	90,996
Effect of exchange rate changes on cash	12	(62)
Net (decrease) increase in cash and cash equivalents	(9,640)	648
Cash and cash equivalents:
Beginning of period	12,773	3,872
End of period	3,133	4,520
Reportable Legal Entities
Cash flows from investing activities:
Proceeds from sales of equity securities	0
Eliminations
Cash flows from operating activities:
Net cash used in operating activities	0	0
Cash flows from investing activities:
Capital expenditures	0	0
Proceeds from the sale of capital assets	0	0
Proceeds from sales of equity securities	0
Investment in subsidiary	135,480	96,202
Acquisition of intangible assets	0	0
Proceeds from the sale of intangible assets		0
Net cash provided by investing activities	135,480	96,202
Cash flows from financing activities:
Proceeds from notes payable	0
Repayment of notes payable	0
Borrowings from revolving credit facility	0	0
Repayments on revolving credit facility	0	0
Proceeds from capital contribution	(134,598)	(100,300)
Repayments of finance lease obligations	0	0
Deferred financing costs	0
Return of capital	(882)	4,098
Net cash provided by financing activities	(135,480)	(96,202)
Effect of exchange rate changes on cash	0	0
Net (decrease) increase in cash and cash equivalents	0	0
Cash and cash equivalents:
Beginning of period	0	0
End of period	0	0
Parent | Reportable Legal Entities
Cash flows from operating activities:
Net cash used in operating activities	0	0
Cash flows from investing activities:
Capital expenditures	0	0
Proceeds from the sale of capital assets	0	0
Proceeds from sales of equity securities	0
Investment in subsidiary	(441)	2,049
Acquisition of intangible assets	0	0
Proceeds from the sale of intangible assets		0
Net cash provided by investing activities	(441)	2,049
Cash flows from financing activities:
Proceeds from notes payable	0
Repayment of notes payable	0
Borrowings from revolving credit facility	0	0
Repayments on revolving credit facility	0	0
Proceeds from capital contribution	0	0
Repayments of finance lease obligations	0	0
Deferred financing costs	0
Return of capital	441	(2,049)
Net cash provided by financing activities	441	(2,049)
Effect of exchange rate changes on cash	0	0
Net (decrease) increase in cash and cash equivalents	0	0
Cash and cash equivalents:
Beginning of period	0	0
End of period	0	0
Guarantor Subsidiaries | Reportable Legal Entities
Cash flows from operating activities:
Net cash used in operating activities	(130,577)	(130,919)
Cash flows from investing activities:
Capital expenditures	(4,653)	(12,193)
Proceeds from the sale of capital assets	19	225
Proceeds from sales of equity securities	5,430
Investment in subsidiary	0	0
Acquisition of intangible assets	(668)	(1,022)
Proceeds from the sale of intangible assets		53,693
Net cash provided by investing activities	128	40,703
Cash flows from financing activities:
Proceeds from notes payable	0
Repayment of notes payable	0
Borrowings from revolving credit facility	0	0
Repayments on revolving credit facility	0	0
Proceeds from capital contribution	134,598	100,300
Repayments of finance lease obligations	(4,119)	(6,768)
Deferred financing costs	0
Return of capital	(441)	(2,049)
Net cash provided by financing activities	130,038	91,483
Effect of exchange rate changes on cash	0	0
Net (decrease) increase in cash and cash equivalents	(411)	1,267
Cash and cash equivalents:
Beginning of period	682	(572)
End of period	271	695
Non-Guarantor Subsidiaries | Reportable Legal Entities
Cash flows from operating activities:
Net cash used in operating activities	(413)	(70)
Cash flows from investing activities:
Capital expenditures	0	0
Proceeds from the sale of capital assets	0	0
Proceeds from sales of equity securities	0
Investment in subsidiary	0	0
Acquisition of intangible assets	0	0
Proceeds from the sale of intangible assets		0
Net cash provided by investing activities	0	0
Cash flows from financing activities:
Proceeds from notes payable	0
Repayment of notes payable	0
Borrowings from revolving credit facility	0	0
Repayments on revolving credit facility	0	0
Proceeds from capital contribution	0	0
Repayments of finance lease obligations	(144)	(187)
Deferred financing costs	0
Return of capital	0	0
Net cash provided by financing activities	(144)	(187)
Effect of exchange rate changes on cash	12	(62)
Net (decrease) increase in cash and cash equivalents	(545)	(319)
Cash and cash equivalents:
Beginning of period	961	783
End of period	416	464
APX Group, Inc. | Reportable Legal Entities
Cash flows from operating activities:
Net cash used in operating activities	0	0
Cash flows from investing activities:
Capital expenditures	0	0
Proceeds from the sale of capital assets	0	0
Investment in subsidiary	(135,039)	(98,251)
Acquisition of intangible assets	0	0
Proceeds from the sale of intangible assets		0
Net cash provided by investing activities	(135,039)	(98,251)
Cash flows from financing activities:
Proceeds from notes payable	225,000
Repayment of notes payable	(229,050)
Borrowings from revolving credit facility	160,000	179,000
Repayments on revolving credit facility	(26,000)	(79,000)
Proceeds from capital contribution	0	0
Repayments of finance lease obligations	0	0
Deferred financing costs	(4,036)
Return of capital	441	(2,049)
Net cash provided by financing activities	126,355	97,951
Effect of exchange rate changes on cash	0	0
Net (decrease) increase in cash and cash equivalents	(8,684)	(300)
Cash and cash equivalents:
Beginning of period	11,130	3,661
End of period	$ 2,446	$ 3,361