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STOCK-BASED COMPENSATION, Stock-Based Compensation Expense (Details) (USD $)
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12 Months Ended | 3 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, 2012
Selling, general, and administrative expenses [Member]
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Dec. 31, 2011
Selling, general, and administrative expenses [Member]
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Dec. 31, 2010
Selling, general, and administrative expenses [Member]
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Mar. 31, 2011
Selling, general, and administrative expenses [Member]
Front Line [Member]
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Dec. 31, 2012
Corporate expenses [Member]
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Dec. 31, 2011
Corporate expenses [Member]
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Dec. 31, 2010
Corporate expenses [Member]
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Dec. 31, 2012
Corporate expenses [Member]
Board of Directors Chairman, Resignation [Member]
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Dec. 31, 2012
Stock Options [Member]
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Dec. 31, 2012
Stock Options [Member]
Minimum [Member]
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Dec. 31, 2012
Stock Options [Member]
Maximum [Member]
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| Stock-based compensation, aggregate disclosures [Abstract] | ||||||||||||||
| Maximum term of award | 10 years | |||||||||||||
| Vesting period | 1 year | 5 years | ||||||||||||
| Stock based compensation expense [Abstract] | ||||||||||||||
| Total stock-based compensation expense | $ 37,063,000 | $ 60,645,000 | $ 61,607,000 | $ 14,297,000 | $ 40,496,000 | $ 34,509,000 | $ 24,400,000 | $ 22,766,000 | $ 20,149,000 | $ 27,098,000 | ||||
| Share-based compensation resulting from accelerated and modified vesting | $ 18,100,000 | $ 10,100,000 | $ 8,000,000 | $ 600,000 | ||||||||||