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SIGNIFICANT ACCOUNTING POLICIES - INVESTMENT IN SSAT (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Investments in affiliates |  |  |
Investment in Terminal Joint Venture | $ 74.3 |  | $ 76.2
Financial information for equity method investment |  |  |
Company Share of Net Income | 4.0 | $ 8.5 |
Ocean Transportation |  |  |
Financial information for equity method investment |  |  |
Company Share of Net Income | 4.0 | 8.5 |
SSAT |  |  |
Investments in affiliates |  |  |
Increase in investment in SSAT | 2.2 |  |
Investment in Terminal Joint Venture | 74.3 |  | $ 76.2
Financial information for equity method investment |  |  |
Operating revenue | 278.9 | 268.1 |
Operating costs and expenses | (265.4) | (244.2) |
Operating Income | 13.5 | 23.9 |
Net Income | $ 13.0 | $ 22.5 |

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