EARNINGS PER SHARE (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income (Numerator)
Net Income	$ 52,033	$ 44,034	$ 128,262	$ 115,269
Net income attributable to noncontrolling interests	(1,188)	(779)	(3,858)	(1,945)
Numerator for diluted earnings per common share available to common shareholders	$ 50,845	$ 43,255	$ 124,404	$ 113,324
Shares (Denominator)
Weighted-average common shares outstanding (shares)	93,948	95,002	94,595	95,146
Dilutive effect of stock-settled appreciation rights, restricted stock awards and outstanding stock options (shares)	818	690	870	691
Weighted-average common and common equivalent shares outstanding (shares)	94,766	95,692	95,465	95,837
Additional Disclosures
Potentially antidilutive dilutive securities excluded from calculation of diluted earnings per share (shares)	525	200	525	200

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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