EARNINGS PER SHARE (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Weighted-average shares outstanding:
Basic (in shares)	87,976,000	88,369,000	88,458,000	88,434,000
Dilutive securities (in shares)	5,344,000	4,496,000	5,124,000	4,481,000
Diluted (in shares)	93,320,000	92,865,000	93,582,000	92,915,000
Options outstanding excluded from the calculations as their effect would have been antidilutive (in shares)	100,000	1,800,000	300,000	2,000,000