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SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Millions	Feb. 08, 2016	Apr. 08, 2015
Underwritten Public Offering
Subsequent Event [Line Items]
Depository shares issued		4,600,000
Offering price per share		$ 25
Subsequent Event \| Series E Preferred Stock
Subsequent Event [Line Items]
Depository shares to preferred stock ratio	2.50%
Non cumulative preferred stock, dividend rate	7.00%
Issuance of stock shares	125,000
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000
Offering price per share	$ 25.00
Subsequent Event \| Underwritten Public Offering
Subsequent Event [Line Items]
Depository shares issued	5,000,000
Offering price per share	$ 25
Subsequent Event \| Underwritten Public Offering \| Series E Preferred Stock
Subsequent Event [Line Items]
Depository shares to preferred stock ratio	2.50%
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000
Proceeds from issuance of depositary shares	$ 121.1
Subsequent Event \| Over Allotment Option \| Series E Preferred Stock
Subsequent Event [Line Items]
Depository shares issued	750,000
Proceeds from issuance of depositary shares	$ 18.2
Underwriters option period	30 days