PER SHARE DATA (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Stock Options [Member]	Mar. 31, 2012 Stock Options [Member]	Jun. 30, 2013 Other Equity Awards [Member]	Mar. 31, 2012 Other Equity Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from diluted shares (in shares)			2,300,000	3,000,000	70,000	68,000
Weighted average exercise price of antidilutive securities (in dollars per share)			$ 21.78	$ 20.80
Income (Numerator) [Abstract]
Income available to common shareholders	$ 20,805	$ 22,866
Effect of dilutive share-based awards	0	0
Income available to common shareholders plus assumed exercise of all outstanding share based awards	$ 20,805	$ 22,866
Shares (Denominator) [Abstract]
Income available to common shareholders (in shares)	94,596,000	91,728,000
Effect of dilutive share-based awards (in shares)	160,000	42,000
Income available to common shareholders plus assumed exercise all outstanding share-based awards (in shares)	94,756,000	91,770,000
Per share amount [Abstract]
Income available to common shareholders (in dollars per share)	$ 0.22	$ 0.25
Income available to common shareholders plus assumed exercise all outstanding share-based awards (in dollars per share)	$ 0.22	$ 0.25