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Basis of Presentation and Summary of Significant Accounting Policies - Subscriber System Depreciation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Amortization of deferred subscriber acquisition costs	$ 20,000	$ 14,000	$ 37,760	$ 27,152
Subscriber system assets, depreciation expense	$ 141,000	$ 137,000	$ 281,000	$ 273,000

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- Definition

Subscriber System Assets, Depreciation Expense

+ References

No definition available.

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- Definition

Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

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- References

No definition available.

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