INCOME TAXES (Details 1) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
|
| Income Tax Contingency [Line Items] | ||||
| Statutory federal tax rate | 35.00% | 35.00% | 35.00% | 35.00% |
| Salt depletion | (11.60%) | (17.30%) | (11.60%) | 19.60% |
| Stock-based compensation | (0.90%) | 0.00% | (5.10%) | 0.00% |
| Foreign rate differential | (8.90%) | (4.10%) | (8.90%) | 3.60% |
| U.S. tax on foreign earnings | 8.80% | 4.00% | 8.80% | (3.40%) |
| Dividends paid to CEOP | (0.50%) | (0.80%) | (0.50%) | 1.10% |
| State income taxes, net | 0.00% | 2.80% | 0.00% | 6.10% |
| Change in tax contingencies | 0.00% | 1.00% | 0.00% | (0.80%) |
| Change in tax contingencies | 0.40% | 0.60% | (16.90%) | (7.20%) |
| Return to provision | (3.20%) | (3.50%) | (0.50%) | 9.00% |
| Impact of tax rate changes | (7.10%) | (2.00%) | (7.50%) | 0.70% |
| Other, net | 0.70% | 2.10% | 0.70% | (0.80%) |
| Effective tax rate | 12.70% | 17.80% | (6.50%) | 62.90% |