Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands |
6 Months Ended | |
|---|---|---|
Jun. 30, 2016 |
Dec. 31, 2015 |
|
| Derivative Financial Instruments | ||
| Derivative financial instruments | $ 556,828 | |
| Treasury Stock | ||
| Treasury Stock, Shares, Retired | 56,118,260 | |
| Treasury stock, at cost (Note 2) | $ (1,569,459) | |
| Accumulated Earnings (Deficit) | ||
| Treasury Stock | ||
| Treasury stock, at cost (Note 2) | $ 1,568,000 | |
| Class A common stock | ||
| Treasury Stock | ||
| Treasury stock, at cost (Note 2) | $ 600 | |
| Northstar Manager LLC | ||
| Variable Interest Entity | ||
| Number of years after wireless spectrum license is granted until put right vests | 5 years | |
| SNR Wireless Management LLC | ||
| Variable Interest Entity | ||
| Number of years after wireless spectrum license is granted until put right vests | 5 years |