EARNINGS PER SHARE (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income (Numerator)
Net Income	$ 44,034	$ 48,768	$ 115,269	$ 118,026
Net (income) loss attributable to noncontrolling interests	(779)	(427)	(1,945)	(1,192)
Numerator for diluted earnings per common share available to common shareholders	$ 43,255	$ 48,341	$ 113,324	$ 116,834
Shares (Denominator)
Weighted-average common shares outstanding	95,002	97,154	95,146	97,712
Dilutive effect of stock-settled appreciation rights, restricted stock awards and outstanding stock options	690	742	691	702
Weighted-average common and common equivalent shares outstanding	95,692	97,896	95,837	98,414
Additional Disclosures
Potentially antidilutive dilutive securities excluded from calculation of diluted earnings per share (in shares)	200	0	200	0