Commitments and Contingencies - Schedule of Significant Customers Accounts Receivable, Concentration of Credit Risk (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Concentration Risk [Line Items]
Amounts due from significant customers	$ 38,656	$ 66,354
Customer Concentration Risk \| Accounts Receivable
Concentration Risk [Line Items]
Amounts due from significant customers	26,922	51,270
Customer Concentration Risk \| Accounts Receivable \| Subsidiaries of AT&T Inc., other than DIRECTV
Concentration Risk [Line Items]
Amounts due from significant customers	6,499	37,955
Customer Concentration Risk \| Accounts Receivable \| DIRECTV
Concentration Risk [Line Items]
Amounts due from significant customers	$ 20,423	$ 13,315

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3-4)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Subparagraph a(1)

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant