EARNINGS PER SHARE (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income (Numerator)
Net Income	$ 46,399	$ 41,601	$ 71,235	$ 69,258
Net (income) loss attributable to noncontrolling interests	(612)	(266)	(1,166)	(765)
Numerator for diluted earnings available to common shareholders	$ 45,787	$ 41,335	$ 70,069	$ 68,493
Shares (Denominator)
Weighted average common shares outstanding	95,307,000	97,174,000	95,219,000	97,994,000
Dilutive effect of stock settled appreciation rights, restricted stock awards and outstanding stock options (in shares)	743,000	690,000	692,000	684,000
Weighted-average common and common equivalent shares outstanding	96,050,000	97,864,000	95,911,000	98,678,000
Additional Disclosures
Potentially antidilutive dilutive securities excluded from calculation of diluted earnings per share (in shares)	0	0	0	0