EMPLOYEE BENEFIT PLANS - Net Periodic Costs and Other Amounts Recognized (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Net periodic pension cost: | |||
| Service cost | $ 55 | $ 64 | $ 560 |
| Interest cost | 775 | 757 | 859 |
| Expected return on plan assets | (989) | (983) | (1,153) |
| Amortization of unrecognized net loss | 153 | 159 | 209 |
| Net periodic (cost) benefit | $ (6) | $ (3) | $ 475 |