CAPITAL TRANSACTIONS (Details) (USD $)	3 Months Ended			9 Months Ended		1 Months Ended		3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jan. 31, 2013	Sep. 30, 2014	Sep. 30, 2013	May 31, 2013 Cumulative Redeemable Preferred Stock, Series E [Member]	Nov. 05, 2014 Cumulative Redeemable Preferred Stock, Series E [Member] Subsequent Event [Member]	Sep. 30, 2014 Cumulative Redeemable preferred Stock, Series E issuance one [Member]	Sep. 30, 2014 Cumulative Redeemable Preferred Stock, Series E issuance two [Member]	Sep. 30, 2013 Series A And Series B Preferred Stock [Member]
Class of Stock [Line Items]
Redeemable preferred stock, shares issued (in shares)						6,800,000
Redeemable preferred stock, face value						$ 170,000,000
Preferred stock, dividend rate (in hundredths)						7.50%
Redeemable preferred stock, liquidation preference per share (in dollars per share)						$ 25.00
Reduction in income per share (in dollars per share)										$ (0.21)
Cash used for redemption of preferred stock										207,000,000
Redemption preference premiums paid	0	0		0	19,924,000					19,924,000
Proceeds from Issuance of Redeemable Preferred Stock						164,300,000		2,500,000	16,300,000
Cash on hand paid to redeem preferred stock						42,700,000
Additional shares issued (in shares)							0	105,000	683,000
Average cost per share (in dollars per share)								$ 23.82	$ 23.94
Common shares repurchased (in shares)			3,600,000
Common shares repurchased			42,400,000
Common stock repurchase program			$ 100,000,000