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RELATED PARTY TRANSACTIONS (Details)	12 Months Ended
RELATED PARTY TRANSACTIONS (Details)	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Executive Chairman [Member]
Related Party Transaction [Line Items]
Number of shares repurchased (in shares)		4,040,234	5,307
Exercise of stock options (in shares)	113,106	422,106	60,000

Number of share options (or share units) exercised during the current period.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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