SUBSEQUENT EVENTS (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended		6 Months Ended		0 Months Ended		0 Months Ended
	May 05, 2014	Jan. 23, 2014	Jun. 30, 2014	Jun. 30, 2013	Jul. 30, 2014 Subsequent Event [Member]	Jul. 30, 2014 Subsequent Event [Member]	Jul. 30, 2014 Subsequent Event [Member] Dividend Declared [Member]
Subsequent Event [Line Items]
Common dividends, declared	$ 0.38	$ 0.36	$ 0.74	$ 0.68			$ 0.38
Preferred stock dividends, declared							$ 0.4453125
Line of Credit Facility, Maximum Borrowing Capacity						$ 500.0
Line of Credit Facility, Accordion Feature, Additional Borrowing Capacity						$ 250.0
Debt Instrument, Term					4 years
Line of Credit Facility, Optional Extension Period					1 year
Line of Credit Facility, Improvement in Pricing					0.90