ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Narrative 4) (Details)			12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 22, 2017	Dec. 31, 2019 USD ($) agreement segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Mar. 31, 2019 USD ($)
Organization And Significant Accounting Policies [Line Items]
Percentage of capital, par value FRB stock required to own			6.00%
FDIC indemnification asset	$ 1,353,000			$ 649,000	$ 1,353,000
Number of agreement with FDIC			2
Number of reportable segment | segment			1
Number of operating segments | segment			1
Unrecognized tax benefits			$ 0
Unrecognized tax benefits, income tax penalties and interest expense			$ 0	$ 0	$ 0
U.S. Federal income tax rate	21.00%	21.00%	21.00%	21.00%	34.00%
Operating Lease, Right-of-Use Asset			$ 8,013,000
Operating Lease, Liability			$ 8,469,000
Single Family Assets [Member]
Organization And Significant Accounting Policies [Line Items]
Term of FDIC agreement			10 years
Number of agreement with FDIC | agreement			1
Non Single Family Commercial Assets [Member]
Organization And Significant Accounting Policies [Line Items]
Term of FDIC agreement			5 years
Number of agreement with FDIC | agreement			1
Minimum [Member]
Organization And Significant Accounting Policies [Line Items]
Allowance for loan and lease losses provision, potential increase			$ 10,000,000.0
Maximum [Member]
Organization And Significant Accounting Policies [Line Items]
Allowance for loan and lease losses provision, potential increase			$ 15,000,000.0
Restatement Adjustment [Member] | Accounting Standards Update 2016-02 [Member]
Organization And Significant Accounting Policies [Line Items]
Operating Lease, Right-of-Use Asset						$ 8,600,000
Operating Lease, Liability						$ 9,100,000