Acquisitions - Fair Values of Assets Acquired and Liabilities Assumed (Parenthetical) (Details)	Sep. 30, 2015	Sep. 16, 2013
2.80 % Senior Notes [Member]
Business Acquisition [Line Items]
Debt instrument Stated interest rate	2.80%
TVN 7.38% Senior Notes [Member]
Business Acquisition [Line Items]
Debt instrument Stated interest rate	7.38%	7.38%
11.00%/12.00% 2021 PIK Toggle Notes [Member] | Minimum [Member]
Business Acquisition [Line Items]
Debt instrument Stated interest rate	11.00%
11.00%/12.00% 2021 PIK Toggle Notes [Member] | Maximum [Member]
Business Acquisition [Line Items]
Debt instrument Stated interest rate	12.00%