Acquisition of Chellomedia Business Combination (Schedule of Proforma) (Details) (Chellomedia [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Chellomedia [Member]
Business Acquisition [Line Items]
Revenues, net	$ 469,172	$ 1,075,744	$ 936,888
Income from continuing operations, net of income taxes	$ 136,357	$ 132,602	$ 199,495
Net income per share, basic	$ 1.91	$ 1.84	$ 2.79
Net income per share, diluted	$ 1.88	$ 1.83	$ 2.75

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

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