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Stock-Based Compensations (Grants) (Details) (USD $)
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12 Months Ended | 3 Months Ended | 12 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2012
Interactive Group [Member]
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Dec. 31, 2012
Interactive Group [Member]
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Dec. 31, 2012
Interactive Group [Member]
Series A [Member]
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Aug. 09, 2012
Interactive Group [Member]
Series A [Member]
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Dec. 31, 2012
Interactive Group [Member]
Series B [Member]
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Aug. 09, 2012
Interactive Group [Member]
Series B [Member]
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Dec. 31, 2012
Interactive Group [Member]
Option Exchange [Member]
Series A [Member]
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Dec. 31, 2012
Interactive Group [Member]
Option Exchange [Member]
Series B [Member]
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Dec. 31, 2012
Interactive Group [Member]
Option Exchange [Member]
Series B [Member]
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Dec. 31, 2012
Ventures Group [Member]
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Dec. 31, 2012
Ventures Group [Member]
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Dec. 31, 2012
Ventures Group [Member]
Series A [Member]
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Aug. 09, 2012
Ventures Group [Member]
Series A [Member]
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Dec. 31, 2012
Ventures Group [Member]
Series B [Member]
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Aug. 09, 2012
Ventures Group [Member]
Series B [Member]
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Dec. 31, 2012
Ventures Group [Member]
Option Exchange [Member]
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Dec. 31, 2012
Ventures Group [Member]
Option Exchange [Member]
Series B [Member]
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Dec. 31, 2012
Ventures Group [Member]
Option Exchange [Member]
Series B [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum | 44.80% | 44.80% | 28.20% | 47.50% | ||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ 7.32 | $ 7.11 | $ 7.15 | $ 8.44 | $ 26.58 | $ 27.29 | ||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum | 47.50% | 46.40% | 47.50% | 49.90% | ||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] | ||||||||||||||||||||
| Outstanding options, Beginning Balance | 45,223,000 | 450,000 | 0 | 1,155,000 | 0 | |||||||||||||||
| Options granted | 6,200,000 | 10,600,000 | 20,100,000 | 3,413,000 | 3,413,000 | 0 | (24,706,000) | 0 | 900,000 | 36,000 | 0 | (1,174,000) | 0 | |||||||
| Options exercised | (9,853,000) | 0 | 20,086,000 | 0 | (181,000) | 0 | 905,000 | 0 | ||||||||||||
| Options forfeited/cancelled | (737,000) | 0 | (19,000) | 0 | ||||||||||||||||
| Outstanding options, Ending Balance | 33,839,000 | 432,000 | 1,155,000 | 1,155,000 | 1,155,000 | 22,000 | ||||||||||||||
| Exercisable options | 12,929,000 | 432,000 | 449,000 | 449,000 | 449,000 | 22,000 | ||||||||||||||
| Outstanding WAEP, Beginning of Period | $ 12.06 | $ 19.74 | $ 0.00 | $ 56.26 | $ 0.00 | |||||||||||||||
| WAEP granted | $ 18.85 | $ 0.00 | $ 10.93 | $ 0.00 | $ 58.49 | $ 0.00 | $ 27.96 | $ 0.00 | ||||||||||||
| WAEP exercised | $ 9.64 | $ 0.00 | $ 19.26 | $ 0.00 | $ 30.91 | $ 0.00 | $ 58.80 | $ 0.00 | ||||||||||||
| WAEP forfeited/cancelled | $ 14.44 | $ 0.00 | $ 34.05 | $ 0.00 | ||||||||||||||||
| Options Adjustment from Recapitalization | 413,000 | (18,000) | 1,588,000 | 22,000 | ||||||||||||||||
| Weighted Average Exercise Price of Adjusted Options from Recapitalization | $ 8.39 | $ 17.92 | $ 30.69 | $ 46.69 | ||||||||||||||||
| Outstanding WAEP, End of Period | $ 16.92 | $ 17.92 | $ 56.26 | $ 56.26 | $ 56.26 | $ 46.69 | ||||||||||||||
| Exercisable WAEP | $ 15.56 | $ 17.92 | $ 52.91 | $ 52.91 | $ 52.91 | $ 46.69 | ||||||||||||||