EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income (Numerator)
Income from continuing operations	$ 30,551	$ 26,477	$ 60,022	$ 85,736
Net (income) loss attributable to noncontrolling interests included in continuing operations	(309)	(107)	(415)	106
Numerator for diluted earnings per common share from continuing operations available to common shareholders	30,242	26,415	59,607	85,977
Income (loss) from discontinued operations, net of taxes	6,100	(125)	11,558	(178)
Numerator for diluted earnings available to common shareholders	36,342	26,290	71,165	85,799
Shares (Denominator)
Weighted average common shares outstanding (in shares)	99,473,000	81,081,000	90,982,000	80,990,000
Dilutive effect of stock settled appreciation rights, restricted stock awards and outstanding stock options (in shares)	766,000	44,000	567,000	23,000
Weighted-average common and common equivalent shares outstanding (in shares)	100,239,000	81,379,000	91,549,000	81,267,000
Additional Disclosures
Antidilutive dilutive securities excluded from calculation of diluted earnings per share (in shares)	0	1,400,000	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		$ 135
Shares (Denominator)
Dilutive effect of debt securities (in shares)		254,000		254,000
3.0% Notes
Earning Per Share
Interest rate (as a percent)	3.00%		3.00%
3.0% Notes | Maximum
Additional Disclosures
Effect of conversion of notes on diluted earnings per share (in dollars per share)	$ 0.01		$ 0.01