Income Taxes (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Common Stock [Member] Liberty Media [Member]	Dec. 31, 2014 Scenario, Forecast [Member]
Related Party Transaction [Line Items]
Income tax expense	$ 76,748	$ 79,040
Effective income tax percentage	45.00%			39.00%
Valuation allowance	$ 7,699
Related party ownership percentage (greater than 50%)			50.00%

Related Party Transaction, Related Party Ownership Percentage

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Number 210

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h))

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-Glossary Income Tax Expense (or Benefit)

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