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STOCK-BASED COMPENSATION, Additional Disclosures (Details) (USD $)
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12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 11 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 11 Months Ended | 12 Months Ended | 35 Months Ended | 12 Months Ended | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2010
Employee Severance [Member]
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Jan. 25, 2010
Ticketmaster [Member]
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Dec. 31, 2010
Ticketmaster [Member]
Employee Severance [Member]
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Jan. 25, 2010
Ticketmaster [Member]
Employees with change in control provisions in employment contracts [Member]
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Dec. 31, 2010
Front Line [Member]
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Jan. 25, 2010
Front Line [Member]
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Dec. 31, 2012
Board of Directors Chairman, Resignation [Member]
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Jun. 30, 2011
Stock Incentive Plan [Member]
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Jan. 31, 2010
Stock Incentive Plan [Member]
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Jan. 31, 2010
Stock Incentive Plan [Member]
Ticketmaster [Member]
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Jan. 31, 2010
Stock Bonus Plan [Member]
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Jan. 25, 2010
Stock Options [Member]
Ticketmaster [Member]
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Jan. 25, 2010
Stock Options [Member]
IAC and the Spincos [Member]
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Dec. 31, 2012
Stock Options [Member]
Board of Directors Chairman, Resignation [Member]
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Jan. 25, 2010
Restricted Stock [Member]
Ticketmaster [Member]
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Dec. 31, 2012
Restricted Stock [Member]
Azoff Trust [Member]
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Dec. 31, 2011
Restricted Stock [Member]
Azoff Trust [Member]
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Dec. 31, 2010
Restricted Stock [Member]
Azoff Trust [Member]
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Jan. 25, 2010
Restricted Stock [Member]
Azoff Trust [Member]
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Dec. 31, 2012
Restricted Stock [Member]
Board of Directors Chairman, Resignation [Member]
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Jan. 25, 2010
RSUs [Member]
Ticketmaster [Member]
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Jan. 25, 2010
RSUs [Member]
IAC and the Spincos [Member]
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Dec. 31, 2012
RSUs [Member]
Board of Directors Chairman, Resignation [Member]
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Dec. 31, 2010
Azoff Trust Note [Member]
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Dec. 31, 2012
Azoff Trust Note [Member]
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Dec. 31, 2011
Azoff Trust Note [Member]
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Dec. 31, 2012
Azoff Trust Note [Member]
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Jan. 25, 2010
Azoff Trust Note [Member]
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Dec. 31, 2011
Azoff Trust Note [Member]
Azoff Trust [Member]
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| Stock-based compensation, aggregate disclosures [Abstract] | ||||||||||||||||||||||||||||||||
| Shares accelerated and modified vesting | 3,400,000 | 1,400,000 | 1,100,000 | 1,500,000 | ||||||||||||||||||||||||||||
| Accelerated vesting of unvested options (in shares) | 700,000 | 300,000 | ||||||||||||||||||||||||||||||
| Stock options forfeited (in shares) | 400,000 | |||||||||||||||||||||||||||||||
| Restricted stock forfeited (in shares) | 200,000 | 400,000 | ||||||||||||||||||||||||||||||
| Additional shares registered (in shares) | 10,000,000 | 4,900,000 | 16,700,000 | 1,500,000 | ||||||||||||||||||||||||||||
| Final exchange ratio as part of Merger Agreement (in shares) | 1.4743728 | |||||||||||||||||||||||||||||||
| Shares issued as part of Merger Agreement (in shares) | 13,000,000 | 2,500,000 | 1,500,000 | 900,000 | 200,000 | |||||||||||||||||||||||||||
| Shares held by the Azoff Trust with guaranteed minimum value (in shares) | 1,500,000 | |||||||||||||||||||||||||||||||
| Stock-based compensation expense | $ 37,063,000 | $ 60,645,000 | $ 61,607,000 | $ 9,800,000 | $ 6,300,000 | $ 3,400,000 | $ 3,200,000 | |||||||||||||||||||||||||
| Stock-based awards not exchanged or modified as a result of the Merger (in shares) | 23,825 | |||||||||||||||||||||||||||||||
| Stock based compensation expense of awards not exchanged or modified as a result of the Merger | 6,900,000 | |||||||||||||||||||||||||||||||
| Total unrecognized compensation cost | 53,800,000 | |||||||||||||||||||||||||||||||
| Amortization period of unrecognized compensation cost (in years) | 3 years 2 months 12 days | |||||||||||||||||||||||||||||||
| Azoff Trust Note [Abstract] | ||||||||||||||||||||||||||||||||
| Interest rate on note issued (in hundredths) | 3.00% | 3.00% | 3.00% | |||||||||||||||||||||||||||||
| Payable in monthly installments | 800,000 | 800,000 | ||||||||||||||||||||||||||||||
| Consideration transferred | 14,400,000 | |||||||||||||||||||||||||||||||
| Total stock based compensation expense recognized | 24,000,000 | |||||||||||||||||||||||||||||||
| Face amount of debt | 38,400,000 | |||||||||||||||||||||||||||||||
| Initial carrying value of the Azoff Trust note payable | 14,400,000 | |||||||||||||||||||||||||||||||
| Corporate expenses recognized | $ 5,900,000 | $ 11,700,000 | $ 6,400,000 | |||||||||||||||||||||||||||||