Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Summary of stock-based compensation expense) (Details)

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STOCK-BASED COMPENSATION (Summary of stock-based compensation expense) (Details) (USD $)
 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Selling, general, and administrative expenses [Member]
Dec. 31, 2012
Selling, general, and administrative expenses [Member]
Dec. 31, 2011
Selling, general, and administrative expenses [Member]
Dec. 31, 2013
Corporate expenses [Member]
Dec. 31, 2012
Corporate expenses [Member]
Dec. 31, 2011
Corporate expenses [Member]
Mar. 31, 2011
Front Line [Member]
Selling, general, and administrative expenses [Member]
Dec. 31, 2012
Restricted Stock [Member]
Trust [Member]
Dec. 31, 2011
Restricted Stock [Member]
Trust [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]                        
Total stock-based compensation expense $ 28,415,000 $ 37,063,000 $ 60,645,000 $ 12,361,000 $ 14,297,000 $ 40,496,000 $ 16,054,000 $ 22,766,000 $ 20,149,000 $ 24,400,000 $ 6,300,000 $ 3,400,000
Total unrecognized compensation cost $ 36,200,000                      
Amortization period of unrecognized compensation cost 2 years 8 months 12 days