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EARNINGS PER SHARE (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Weighted-average shares outstanding:        
Basic (in shares) 176,186,000 176,950,000 175,509,000 177,402,000
Dilutive securities (in shares) 10,098,000 10,258,000 10,324,000 9,882,000
Diluted (in shares) 186,284,000 187,208,000 185,833,000 187,284,000
Options outstanding excluded from the calculations as their effect would have been antidilutive (in shares) 200,000 600,000 200,000 700,000