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REGULATORY CAPITAL MATTERS - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended	3 Months Ended				12 Months Ended
	Aug. 23, 2019	Sep. 17, 2018	Apr. 30, 2019	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common stock dividends declared and paid (in usd per share), Dividends, Per Share, Cash Paid				$ 0.06	$ 0.06	$ 0.06	$ 0.13
Quarterly dividend (in usd per share)			$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.13	$ 0.31	$ 0.52	$ 0.52
Preferred Stock
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Aggregate amount of redemption		$ 40.3
Preferred Stock | Series D Depository shares
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Aggregate amount of redemption	$ 19.4
Preferred Stock | Series E Depository shares
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Aggregate amount of redemption	26.6
The Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Payments of Dividends	$ 88.5							$ 142.5

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Aggregate dividends paid during the period for each share of common stock outstanding.

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