Commitments and Contingencies (Details Textual) (USD $)	3 Months Ended	6 Months Ended							3 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014	Dec. 31, 2013	Aug. 31, 2012	Jun. 30, 2010 FSD [Member]	Jun. 30, 2014 Thales Alenia Space France [Member]	Mar. 31, 2014 Space Exploration Technologies Corp [Member]	Jun. 30, 2014 Space Exploration Technologies Corp [Member]	Jun. 30, 2014 Kosmotras [Member]	Jun. 30, 2013 Kosmotras [Member]
Commitments And Contingencies [Line Items]
Construction in Progress, Gross								$ 1,122,000,000		$ 85,400,000	$ 23,300,000
Maximum Commitments Amount						453,100,000
Commitments Price For Design and Build Of Satellites							2,300,000,000
Refundable Deposit									3,000,000
Credit facility	1,084,425,000	1,084,425,000			1,039,203,000
Unused Portion Credit Facility	715,600,000	715,600,000
Minimum Required Cash Reserve Balance For Credit Facility	83,500,000	83,500,000
Minimum Required Cash Reserve Balance For Credit Facility At Beginning Of Repayment Period		189,000,000
Interest Expense	12,500,000	24,500,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.80%
Line Of Credit Facility, Commitment Fee Payable	1,400,000	1,400,000
Purchase Obligation Amount For Single Launch												51,800,000
Construction In Progress Funded By Credit Facility	953,000,000	953,000,000
Cash Restricted For Debt Service Reserve Decreases	11,000,000	11,009,000	0
Invoice Received Payment Term Description		The Company currently uses the Credit Facility to pay 85% of each invoice received from Thales under the FSD contract with the remaining 15% funded from cash on hand. Once the Credit Facility is fully drawn, the Company expects to pay 100% of each invoice received from Thales from cash and marketable securities on hand, and internally generated cash flows.
Line Of Credit Facility Minimum Cash Reserve Required Prior To Execution Of Supplemental Agreement	83,500,000	83,500,000		94,500,000
Line of Credit Facility Delay of Contributions to Debt Service Reserve Account, Description		The Supplemental Agreement delays $22 million of the Companys 2014 contributions, $22 million of the Companys 2015 contributions and $32 million of the Companys expected 2016 contributions, for a total of $76 million
Line Of Credit Facility, Commitment Fee Paid Amount		$ 3,200,000