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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Oct. 11, 2019 USD ($) | Oct. 11, 2019 USD ($) | Oct. 10, 2019 USD ($) $ / shares shares | Sep. 13, 2019 | Oct. 27, 2017 USD ($) | Dec. 31, 2019 USD ($) segment subsidiary item $ / shares shares | Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2017 USD ($) shares | Feb. 15, 2019 USD ($)
ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |
Number of subsidiary | subsidiary |  |  |  |  |  | 5 |  |  |
Issuance of common stock (in shares) | shares |  |  | 9,429,794 |  |  |  |  |  |
Share price | $ / shares |  |  | $ 16.00 |  |  |  |  |  |
Proceeds from initial public offering |  |  | $ 138,493,000 |  |  |  |  |  |
Special dividend fund |  |  | $ 170,000,000 |  |  |  |  |  |
Special dividend per share | $ / shares |  |  | $ 9.43 |  |  |  |  |  |
Pro forma dilutive instruments | shares |  |  |  |  |  | 0 | 0 | 0 |
Transfer amount |  |  |  |  |  | $ 0 | $ 0 | $ 0 |
Restricted Investments |  |  |  |  |  | $ 2,425,000 | 2,719,000 |  |
Number of primary components of allowance for loan losses | item |  |  |  |  |  | 2 |  |  |
Actual loss history period |  |  |  |  |  | 4 years |  |  |
Total loan exposure subject to credit risk |  |  |  |  |  | $ 500,000 |  |  |
Definite useful lives of other identifiable intangible assets |  |  |  |  |  | 10 years |  |  |
Branch buildings classified as held for sale |  |  |  |  |  | $ 121,000 | 749,000 |  |
Impairment loss |  |  |  |  |  | $ 37,000 | 52,000 | 1,936,000 |
Contractual interest rates of FDIC indemnification asset |  |  |  |  |  | 0.00% |  |  |
Cash payments to FDIC pursuant to termination of agreement |  |  |  |  | $ 4,929,000 |  |  |  |
Write-down of FDIC indemnification asset |  |  |  |  | $ 459,000 |  |  |  |
Percentage matching the compensation contributed by employees |  |  |  |  |  | 5.00% |  |  |
Provision for prepaid dividend |  |  |  |  |  | $ 0 |  |  |
Deferred tax asset | $ 534,000 | $ 534,000 |  |  |  | 3,406,000 |  |  |
Income tax benefit | $ 500,000 | $ 534,000 |  |  |  | (5,256,000) | (869,000) | $ (870,000) |
Uncertain tax positions |  |  |  |  |  | $ 0 | $ 0 |  |
Dilutive instruments outstanding | shares |  |  |  |  |  | 0 | 0 | 0 |
Number of segments | segment |  |  |  |  |  | 1 |  |  |
Common stock and preferred stock, shares authorized | shares |  |  | 150,000,000 |  |  |  |  |  |
Common stock, shares converted | shares |  |  | 1 |  |  |  |  |  |
Common stock, shares authorized | shares |  |  | 125,000,000 |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  | $ 0.01 |  |  |  |  |  |
Preferred stock, shares authorized | shares |  |  | 25,000,000 |  |  | 25,000,000 |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  |  | $ 0.01 |  |  | $ 0.01 |  |  |
Common Stock |  |  |  |  |  |  |  |  |
ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |
Stock split ratio |  |  |  | 20 |  |  |  |  |
Series A Nonvoting |  |  |  |  |  |  |  |  |
ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |
Stock split ratio |  |  |  | 20 |  |  |  |  |
Common stock, shares authorized | shares |  |  |  |  |  |  | 24,000,000 |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 0.01 |  |
Single-family loss-share agreement |  |  |  |  |  |  |  |  |
ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |
Original term |  |  |  |  |  | 10 years |  |  |
Non-single family residential loss-share agreement |  |  |  |  |  |  |  |  |
ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |
Original term |  |  |  |  |  | 8 years |  |  |
Related parties |  |  |  |  |  |  |  |  |
ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |
Loans |  |  |  |  |  | $ 4,162,000 | $ 830,000 |  |
Financial asset acquired with credit deterioration | Loans |  |  |  |  |  |  |  |  |
ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |
Allowance for credit loss |  |  |  |  |  | $ 0 |  |  |
First Community Title Services, Inc. |  |  |  |  |  |  |  |  |
ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |
Consideration received |  |  |  |  |  |  |  |  | $ 498,000

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