Schedule II Valuation And Qualifying Accounts (Details) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]
Deferred Other Tax Expense Benefit						$ (335,300,000)
Allowance For Billed Receivables [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		223,000				3,682,000
Charged to Costs and Expenses		(223,000)	[1]
Deductions From Reserves						(3,459,000)	[2]
Balance at End of Period	223,000					223,000
Inventory Allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		31,360,000		31,370,000		28,297,000
Charged to Costs and Expenses		(31,360,000)	[1]	(10,000)	[1]	4,297,000	[1]
Deductions From Reserves						(1,224,000)	[2]
Balance at End of Period	31,370,000			31,360,000		31,370,000
Deferred Tax Valuation Allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		10,887,000		11,229,000		414,038,000
Charged to Costs and Expenses		(3,779,000)	[1]	(375,000)	[1]	(402,809,000)	[1]
Charged to Other Accounts				33,000	[3]
Balance at End of Period	11,229,000	7,108,000		10,887,000		11,229,000
Deferred Other Tax Expense Benefit	335,300,000
Valuation allowance change	67,500,000
Continuing Operations [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation allowance change						40,100,000
Discontinued Operations [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation allowance change						$ 27,400,000

[1] During the fourth quarter of 2010, we determined, based on all available evidence, that a full valuation allowance was no longer required on our deferred tax assets and, therefore, $335.3 million of the valuation allowance was reversed as an income tax benefit. In addition, the valuation allowance was reduced by $67.5 million, of which $40.1 million was recorded as a benefit to continuing operations and $27.4 million was recorded as a benefit to discontinued operations. Allowances for billed receivables and inventory charged to costs and expenses in 2012 reflect the Sale of SS/L on November 2, 2012.

[2] Deductions from reserves reflect write-offs of uncollectible billed receivables and disposals of inventory.

[3] Changes in the deferred tax valuation allowance which have been charged to other accounts have been recorded in accumulated other comprehensive loss and other deferred tax assets.