EMPLOYEE SAVINGS AND BENEFIT PLANS (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Deferred Compensation Plans | |||
| Beginning of period balance | $ 40,995 | $ 10,875 | $ 10,137 |
| Deferred compensation assumed in Merger | 0 | 27,057 | 0 |
| Employee compensation deferrals | 384 | 840 | 963 |
| Increase (decrease) in plan fair value | (1,742) | 3,407 | 720 |
| End of period balance | 30,928 | 40,995 | 10,875 |
| Employee Compensation Payments | (8,709) | 1,184 | (945) |
| Company's contribution to the 401K Plan | |||
| 401(K) savings plan expense | $ 6,100 | $ 2,900 | $ 1,000 |