Goodwill and Other Intangible Assets (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Regulatory authorizations and intangible assets
Finite useful lives, Cost	$ 709,977,000		$ 709,977,000
Finite useful lives, Accumulated amortization	(470,098,000)		(447,938,000)
Carrying amount	239,879,000		262,039,000
Total regulatory authorizations	584,641,000		583,900,000
Amortization of regulatory authorizations	24,300,000	21,600,000
Finite lives
Regulatory authorizations and intangible assets
Finite useful lives, Cost	116,085,000		113,764,000
Finite useful lives, Accumulated amortization	(3,101,000)		(1,521,000)
Carrying amount	112,984,000		112,243,000
Amortization of regulatory authorizations	1,500,000	0
Total regulatory authorizations
Regulatory authorizations and intangible assets
Total regulatory authorizations	584,641,000		583,900,000
Indefinite lives
Regulatory authorizations and intangible assets
Indefinite lives	$ 471,657,000		$ 471,657,000