PER SHARE DATA (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from diluted shares (in shares)	414		69
Weighted average exercise price of antidilutive securities (in dollars per share)	$ 24.32	$ 23.41	$ 24.89	$ 23.39
Income (Numerator) [Abstract]
Income available to common shareholders	$ 30,868,000.000	$ 20,755,000.000	$ 59,312,000.000	$ 41,560,000.000
Income available to common shareholders plus assumed exercise of all outstanding share based awards	$ 30,868,000.000	$ 20,755,000.000	$ 59,312,000.000	$ 41,560,000.000
Shares (Denominator) [Abstract]
Income available to common shareholders (in shares)	96,034	95,177	95,832	94,886
Effect of dilutive share-based awards (in shares)	339	229	331	195
Income available to common shareholders plus assumed exercise all outstanding share-based awards (in shares)	96,373	95,406	96,163	95,081
Per share amount [Abstract]
Income available to common shareholders (in dollars per share)	$ 0.32	$ 0.22	$ 0.62	$ 0.44
Income available to common shareholders plus assumed exercise all outstanding share-based awards (in dollars per share)	$ 0.32	$ 0.22	$ 0.62	$ 0.44
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from diluted shares (in shares)	414	1,700		1,900
Other Equity Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from diluted shares (in shares)	10	4	5	2