v2.3.0.15

Marketable Investment Securities, Restricted Cash and Other Investment Securities (Details 7) (USD $) Share data in Millions, unless otherwise specified | 9 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  | 1 Months Ended |  |  |  |
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Sep. 30, 2011 | Sep. 30, 2011 TerreStar Corporation and TerreStar Network | Sep. 30, 2011 TerreStar Corporation and TerreStar Network 15% Senior Secured Paid-in-Kind Notes due February 15, 2014 | Sep. 30, 2011 TerreStar Corporation and TerreStar Network February 2008 Secured Financing Commitment | Sep. 30, 2011 TerreStar Corporation and TerreStar Network Debtor-In-Possession Credit Facility | Jun. 30, 2008 TerreStar Corporation GHz | Sep. 30, 2011 TerreStar Corporation | Sep. 30, 2010 TerreStar Corporation | Sep. 30, 2011 TerreStar Corporation | Sep. 30, 2010 TerreStar Corporation | Dec. 31, 2010 TerreStar Corporation | Feb. 29, 2008 TerreStar Corporation member | Sep. 30, 2011 TerreStar Network Inc. | Dec. 31, 2010 TerreStar Network Inc. | Feb. 29, 2008 TerreStar Network Inc. 6 1/2 % Senior Exchangeable Paid-In-Kind Notes Due June 15, 2014 | Feb. 29, 2008 TerreStar Network Inc. 15% Senior Secured Paid-in-Kind Notes due February 15, 2014 | Feb. 29, 2008 TerreStar Network Inc. February 2008 Secured Financing Commitment | Nov. 18, 2010 TerreStar Network Inc. Debtor-In-Possession Credit Facility | Aug. 11, 2011 Gamma Acquisition L.L.C. (Gamma) Assets purchase agreement with TerreStar Networks, Inc. (TerreStar) | Jun. 14, 2011 Gamma Acquisition L.L.C. (Gamma) Assets purchase agreement with TerreStar Networks, Inc. (TerreStar)
Marketable investment securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of investment acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000 | $ 50,000,000 |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.50% | 15.00% |  |  |  |
Number of board members the Company may appoint under Master Investment Agreement |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |
Frequency of spectrum acquired (in GHz) |  |  |  |  |  | 1.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares of common stock issued to acquire spectrum (in shares) |  |  |  |  |  | 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment under credit agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50,000,000 | 90,000,000 |  |
Cash purchase price of assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,375,000,000
Purchase price prior to receipt of approvals from FCC or Canadian Department of Industry |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,345,000,000 |
Amount received related to debt investment | 567,303,000 | 552,000,000 | 419,000,000 | 48,000,000 | 85,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount received subsequently related to debt investment |  |  | 77,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment outstanding amount |  | 63,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of debt investments |  |  |  |  |  |  |  |  |  |  |  |  | 140,000,000 | 626,000,000 |  |  |  |  |  |
Fair value of equity investments |  |  |  |  |  |  | 1,000,000 |  | 1,000,000 |  | 4,000,000 |  |  |  |  |  |  |  |  |
Unrealized gains (losses) on investments accounted for at fair value, net |  |  |  |  |  |  | $ 2,000,000 | $ (21,000,000) | $ 10,000,000 | $ 23,000,000 |  |  |  |  |  |  |  |  |  |

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