EARNINGS PER SHARE (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income (Numerator)
Income from continuing operations	$ 12,956,000	$ 30,134,000	$ 29,471,000	$ 59,259,000
Net (income) loss attributable to noncontrolling interests included in continuing operations	(233,000)	(72,000)	(106,000)	213,000
Numerator for diluted earnings per common share from continuing operations available to common shareholders	12,794,000	30,107,000	29,508,000	59,562,000
Income (loss) from discontinued operations, net of taxes	5,103,000	(2,000)	5,458,000	(53,000)
Numerator for diluted earnings available to common shareholders	17,897,000	30,105,000	34,966,000	59,509,000
Shares (Denominator)
Weighted average common shares outstanding (in shares)	92,083,000	81,036,000	86,667,000	80,944,000
Dilutive effect of stock settled appreciation rights, restricted stock awards and outstanding stock options (in shares)	871,000	4,000	547,000	13,000
Weighted-average common and common equivalent shares outstanding (in shares)	93,604,000	81,294,000	87,844,000	81,211,000
Additional Disclosures
Antidilutive dilutive securities excluded from calculation of diluted earnings per share (in shares)	0	1,500,000	0	1,500,000
4.875% Notes
Earning Per Share
Interest rate (as a percent)	4.875%		4.875%
Income (Numerator)
Income impact of assumed conversion of debt securities, net of taxes	45,000	45,000	90,000	90,000
Shares (Denominator)
Dilutive effect of debt securities (in shares)	339,000	254,000	339,000	254,000
3.0% Notes
Earning Per Share
Interest rate (as a percent)	3.00%		3.00%
Income (Numerator)
Income impact of assumed conversion of debt securities, net of taxes	$ 26,000		$ 53,000
Shares (Denominator)
Dilutive effect of debt securities (in shares)	311,000		311,000