EMPLOYEE BENEFITS & SHARE-BASED COMPENSATION PLANS - Shares held by ESOP (Details) - shares |
Mar. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|---|
| Shares held by the ESOP include the following: | |||
| Allocated | 95,240 | 71,430 | 47,620 |
| Committed to be allocated | 5,952 | 23,810 | 23,810 |
| Unallocated | 255,960 | 261,912 | 285,722 |
| Total | 357,152 | 357,152 | 357,152 |