Guarantor and Non-Guarantor Supplemental Financial Information - Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
ASSETS
Current assets	$ 230,861	$ 123,498
Property, plant and equipment, net	61,600	73,401
Capitalized contract costs, net	1,170,687	1,115,775
Deferred financing costs, net	1,572	2,058
Investment in subsidiaries	0	0
Intercompany receivable	0	0
Intangible assets, net	217,778	255,085
Goodwill	836,289	834,855
Operating lease right-of-use assets	71,557	0
Long-term notes receivables and other assets	122,631	119,819
Total assets	2,712,975	2,524,491
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Current liabilities	589,816	463,536
Intercompany payable	0	0
Notes payable and revolving credit facility, net of current portion	3,164,749	3,037,095
Finance lease liabilities	3,397	5,571
Deferred revenue, net of current portion	383,266	323,585
Operating lease liabilities	69,975	0
Other long-term obligations	99,736	90,209
Accumulated losses of investee, net	0	0
Deferred income tax liability	1,139	1,096
Total stockholders’ deficit	(1,599,103)	(1,396,601)	$ (1,167,783)
Total liabilities and stockholders’ deficit	2,712,975	2,524,491
Eliminations
ASSETS
Current assets	(315,770)	(262,674)
Property, plant and equipment, net	0	0
Capitalized contract costs, net	0	0
Deferred financing costs, net	0	0
Investment in subsidiaries	(1,595,121)	(1,662,367)
Intercompany receivable	(6,303)	(6,303)
Intangible assets, net	0	0
Goodwill	0	0
Operating lease right-of-use assets	0
Long-term notes receivables and other assets	(106)	(106)
Total assets	(1,917,300)	(1,931,450)
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Current liabilities	(315,770)	(262,674)
Intercompany payable	(6,303)	(6,303)
Notes payable and revolving credit facility, net of current portion	0	0
Finance lease liabilities	0	0
Deferred revenue, net of current portion	0	0
Operating lease liabilities	0
Other long-term obligations	0	0
Accumulated losses of investee, net	(1,599,103)	(1,396,601)
Deferred income tax liability	(106)	(106)
Total stockholders’ deficit	3,982	(265,766)
Total liabilities and stockholders’ deficit	(1,917,300)	(1,931,450)
Parent | Reportable Legal Entities
ASSETS
Current assets	0	0
Property, plant and equipment, net	0	0
Capitalized contract costs, net	0	0
Deferred financing costs, net	0	0
Investment in subsidiaries	0	0
Intercompany receivable	0	0
Intangible assets, net	0	0
Goodwill	0	0
Operating lease right-of-use assets	0
Long-term notes receivables and other assets	0	0
Total assets	0	0
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Current liabilities	0	0
Intercompany payable	0	0
Notes payable and revolving credit facility, net of current portion	0	0
Finance lease liabilities	0	0
Deferred revenue, net of current portion	0	0
Operating lease liabilities	0
Other long-term obligations	0	0
Accumulated losses of investee, net	1,599,103	1,396,601
Deferred income tax liability	0	0
Total stockholders’ deficit	(1,599,103)	(1,396,601)
Total liabilities and stockholders’ deficit	0	0
Guarantor Subsidiaries | Reportable Legal Entities
ASSETS
Current assets	408,215	269,770
Property, plant and equipment, net	61,215	72,937
Capitalized contract costs, net	1,101,598	1,047,532
Deferred financing costs, net	0	0
Investment in subsidiaries	0	0
Intercompany receivable	6,303	6,303
Intangible assets, net	201,538	236,677
Goodwill	810,129	809,678
Operating lease right-of-use assets	71,345
Long-term notes receivables and other assets	101,695	102,695
Total assets	2,762,038	2,545,592
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Current liabilities	662,048	507,063
Intercompany payable	0	0
Notes payable and revolving credit facility, net of current portion	0	0
Finance lease liabilities	3,397	5,570
Deferred revenue, net of current portion	363,958	306,653
Operating lease liabilities	69,894
Other long-term obligations	98,859	90,209
Deferred income tax liability	106	106
Total stockholders’ deficit	1,563,776	1,635,991
Total liabilities and stockholders’ deficit	2,762,038	2,545,592
Non-Guarantor Subsidiaries | Reportable Legal Entities
ASSETS
Current assets	135,703	103,451
Property, plant and equipment, net	385	464
Capitalized contract costs, net	69,089	68,243
Deferred financing costs, net	0	0
Investment in subsidiaries	0	0
Intercompany receivable	0	0
Intangible assets, net	16,240	18,408
Goodwill	26,160	25,177
Operating lease right-of-use assets	212
Long-term notes receivables and other assets	20,936	17,124
Total assets	268,725	232,867
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Current liabilities	209,672	182,159
Intercompany payable	6,303	6,303
Notes payable and revolving credit facility, net of current portion	0	0
Finance lease liabilities	0	1
Deferred revenue, net of current portion	19,308	16,932
Operating lease liabilities	81
Other long-term obligations	877	0
Deferred income tax liability	1,139	1,096
Total stockholders’ deficit	31,345	26,376
Total liabilities and stockholders’ deficit	268,725	232,867
APX Group, Inc. | Reportable Legal Entities
ASSETS
Current assets	2,713	12,951
Property, plant and equipment, net	0	0
Capitalized contract costs, net	0	0
Deferred financing costs, net	1,572	2,058
Investment in subsidiaries	1,595,121	1,662,367
Intercompany receivable	0	0
Intangible assets, net	0	0
Goodwill	0	0
Operating lease right-of-use assets	0
Long-term notes receivables and other assets	106	106
Total assets	1,599,512	1,677,482
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Current liabilities	33,866	36,988
Intercompany payable	0	0
Notes payable and revolving credit facility, net of current portion	3,164,749	3,037,095
Finance lease liabilities	0	0
Deferred revenue, net of current portion	0	0
Operating lease liabilities	0
Other long-term obligations	0	0
Deferred income tax liability	0	0
Total stockholders’ deficit	(1,599,103)	(1,396,601)
Total liabilities and stockholders’ deficit	$ 1,599,512	$ 1,677,482