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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Millions		3 Months Ended
	Dec. 31, 2019 USD ($) segment	Mar. 31, 2020 USD ($) segment	Jan. 31, 2020
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	$ 0.2	$ 0.1
Proportional Amortization Investments	15.3	15.0
Cost Method Investments	$ 1.6	$ 1.6
Number of operating segments | segment	3	1
Available for sale accrued interest receivable		$ 4.5
Financing receivable accrued interest receivable		$ 12.4
Oahu HomeLoans, LLC
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage			50.00%

X

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Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss

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Financing Receivable, Accrued Interest, after Allowance for Credit Loss

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Proportional Amortization Investments

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