EQUITY (Details) (USD $)	0 Months Ended			6 Months Ended			6 Months Ended		3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended
	May 01, 2013	Mar. 21, 2013	Jan. 07, 2013	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Jun. 30, 2013 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2013 Stock Options [Member]	Jun. 30, 2012 Stock Options [Member]	Jun. 30, 2013 Stock Options [Member]	Jun. 30, 2012 Stock Options [Member]	Jun. 30, 2012 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2013 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2012 Restricted Stock Units (RSUs) [Member]
Equity [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount									108,000	0	126,000	10,000	5,000	15,000
Preferred stock, shares issued		5,800,000		5,750,000		0
Common dividends, declared	$ 0.34		$ 0.34	$ 0.68	$ 0.66
Stock issuance, Value					$ 144,000
Stock-based compensation, issued during period (in shares)							200,799	33,935
Preferred Stock, Dividend Rate, Percentage				7.125%
Preferred Stock, Redemption Price Per Share		$ 25.00
Proceeds from Issuance of Preferred Stock		138,300,000		138,345,000	0
Convertible Preferred Stock, Terms of Conversion				1.7864
Common Stock, At The Market Stock Offering, Max Possible Gross Proceeds				$ 100,000,000
Common Stock, At the Market Stock Offering, Sales Commision				2.00%
Common Stock, At the Market Stock Offering, Number of Shares Sold				0