PER SHARE DATA (Details) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Income (Numerator) [Abstract]
Income available to common shareholders	$ 11,934	$ 11,260	$ 24,266	$ 7,096
Effect of dilutive share-based awards	0	0	0	0
Income available to common shareholders plus assumed exercise of all outstanding share-based awards	$ 11,934	$ 11,260	$ 24,266	$ 7,096
Shares (Denominator) [Abstract]
Income available to common shareholders (in shares)	83,489,000	83,433,000	83,486,000	83,422,000
Effect of dilutive share-based awards (in shares)	0	40,000	26,000	108,000
Income available to common shareholders plus assumed exercise of all outstanding share-based awards (in shares)	83,489,000	83,473,000	83,512,000	83,530,000
Per share amount [Abstract]
Income available to common shareholders (in dollars per share)	$ 0.14	$ 0.13	$ 0.29	$ 0.09
Income available to common shareholders plus assumed exercise of all outstanding share-based awards (in dollars per share)	$ 0.14	$ 0.13	$ 0.29	$ 0.08
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from diluted shares (in shares)	2,900,000	2,500,000	2,900,000	2,200,000
Weighted average exercise price of antidilutive securities (in dollars per share)	$ 21.50	$ 22.75	$ 21.45	$ 23.54
Other Equity Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from diluted shares (in shares)			2,000