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Stock-Based Compensation (Outstanding Awards) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2009
|
Dec. 31, 2013
|
Dec. 31, 2013
Ventures Group [Member]
|
Dec. 31, 2012
Ventures Group [Member]
|
Dec. 31, 2012
Ventures Group [Member]
Series A [Member]
|
Mar. 31, 2012
Ventures Group [Member]
Series A [Member]
|
Dec. 31, 2013
Ventures Group [Member]
Series A [Member]
|
Dec. 31, 2013
Ventures Group [Member]
Class B [Member]
|
Dec. 31, 2012
Ventures Group [Member]
Class B [Member]
|
Dec. 31, 2013
Ventures Group [Member]
Common Class B [Member]
|
Dec. 31, 2013
Interactive Group [Member]
|
Dec. 31, 2012
Interactive Group [Member]
Series A [Member]
|
Dec. 31, 2013
Interactive Group [Member]
Series A [Member]
|
Dec. 31, 2012
Interactive Group [Member]
Series A [Member]
|
Dec. 31, 2011
Interactive Group [Member]
Series A [Member]
|
Dec. 31, 2013
Interactive Group [Member]
Class B [Member]
|
Dec. 31, 2012
Interactive Group [Member]
Class B [Member]
|
Dec. 31, 2013
Interactive Group [Member]
Common Class B [Member]
|
Dec. 31, 2013
Interactive Group [Member]
Series A [Member]
|
Dec. 31, 2012
Interactive Group [Member]
Series A [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | Ìý | Ìý | $ 13.36 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 17.09 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Outstanding options | Ìý | Ìý | Ìý | 1,155,000 | Ìý | Ìý | 966,000 | 22,000 | 22,000 | Ìý | Ìý | Ìý | 30,607,000 | Ìý | Ìý | 432,000 | 432,000 | Ìý | 30,607,000 | 33,839,000 |
| Outstanding WAEP | Ìý | $ 40.18 | $ 57.42 | $ 56.26 | Ìý | Ìý | Ìý | $ 46.69 | $ 46.69 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 17.92 | $ 17.92 | Ìý | $ 17.98 | $ 16.92 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures | Ìý | Ìý | 7,000 | Ìý | 900,000 | 0 | 7,000 | 0 | Ìý | Ìý | Ìý | 20,100,000 | 4,300,000 | 3,400,000 | 6,200,000 | 0 | Ìý | Ìý | 4,296,000 | Ìý |
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | Ìý | Ìý | $ 116.03 | Ìý | Ìý | Ìý | Ìý | $ 0.00 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 0.00 | Ìý | Ìý | $ 21.25 | Ìý |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | Ìý | Ìý | (195,000) | Ìý | Ìý | Ìý | Ìý | 0 | Ìý | Ìý | Ìý | Ìý | (6,933,000) | Ìý | Ìý | 0 | Ìý | Ìý | (6,933,000) | Ìý |
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price | Ìý | Ìý | $ 52.81 | Ìý | Ìý | Ìý | Ìý | $ 0.00 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 0.00 | Ìý | Ìý | $ 15.05 | Ìý |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period | Ìý | Ìý | (1,000) | Ìý | Ìý | Ìý | Ìý | 0 | Ìý | Ìý | Ìý | Ìý | (595,000) | Ìý | Ìý | 0 | Ìý | Ìý | (595,000) | Ìý |
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price | Ìý | Ìý | $ 45.28 | Ìý | Ìý | Ìý | Ìý | $ 0.00 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 0.00 | Ìý | Ìý | $ 15.28 | Ìý |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term | 10 years | Ìý | Ìý | Ìý | Ìý | Ìý | 5 years | Ìý | Ìý | 1 year 4 months 24 days | Ìý | Ìý | 5 years | Ìý | Ìý | Ìý | Ìý | 1 year 4 months 24 days | 5 years | Ìý |
| Aggregate intrinsic value | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 62,981 | Ìý | Ìý | $ 1,631 | Ìý | Ìý | $ 348,277 | Ìý | Ìý | Ìý | Ìý | $ 4,955 | Ìý | Ìý |
| Exercisable options | Ìý | Ìý | 492,000 | Ìý | Ìý | Ìý | Ìý | 22,000 | Ìý | Ìý | Ìý | Ìý | 14,056,000 | Ìý | Ìý | 432,000 | Ìý | Ìý | 14,056,000 | Ìý |
| Exercisable WAEP | Ìý | $ 30.11 | $ 55.47 | Ìý | Ìý | Ìý | Ìý | $ 46.69 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 17.92 | Ìý | Ìý | $ 16.47 | Ìý |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 4 years 7 months 6 days | Ìý | Ìý | 1 year 4 months 24 days | Ìý | Ìý | 4 years 4 months 24 days | Ìý | Ìý | Ìý | Ìý | 1 year 4 months 24 days | 4 years 4 months 24 days | Ìý |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value | Ìý | $ 186,000 | Ìý | Ìý | Ìý | Ìý | $ 33,042 | Ìý | Ìý | $ 1,631 | Ìý | Ìý | $ 181,315 | Ìý | Ìý | Ìý | Ìý | $ 4,955 | Ìý | Ìý |