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RESTRUCTURING - Restructuring Reserve (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance at beginning of period | $ 161 | $ 7,002 | $ 202 | $ 0 | $ 0
Accrual: |  |  |  |  |
Continuing Operations | 3,983 | 82 | 3,983 | 5,369 |
Discontinued Operations | 0 | 297 | 0 | 3,515 |
Total | 3,983 | 379 | 3,983 | 8,884 | 9,100
Payments | (1,463) | (6,694) | (1,504) | (8,197) |
Balance at end of period | 2,681 | 687 | 2,681 | 687 | $ 202
Severance and other employee related costs |  |  |  |  |
Accrual: |  |  |  |  |
Continuing Operations | 3,983 | 82 | 3,983 | 5,369 |
Discontinued Operations | 0 | 297 | 0 | 2,620 |
Total | 3,983 | 379 | 3,983 | 7,989 |
Payments | $ (1,463) | (5,799) | $ (1,504) | (7,302) |
Other restructuring expense |  |  |  |  |
Accrual: |  |  |  |  |
Continuing Operations |  |  |  | 0 |
Discontinued Operations |  |  |  | 895 |
Total |  |  |  | 895 |
Payments |  | $ (895) |  | $ (895) |

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