INVESTMENTS SECURITIES AVAILABLE-FOR-SALE (Detail Textuals) - USD ($) |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2019 |
Dec. 31, 2017 |
Dec. 31, 2018 |
|
| Investments, Debt and Equity Securities [Abstract] | |||
| Gross realized gains on sales and calls | $ 216,000 | $ 6,400,000 | |
| Gross losses realized | 103,000 | 505,000 | |
| Securities pledged to secure available borrowings with the Federal Reserve Bank and Federal Home Loan Bank | $ 38,100,000 | $ 39,800,000 | $ 31,100,000 |