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Foreign Exchange	9 Months Ended
Foreign Exchange	Sep. 30, 2017
Foreign Currency [Abstract]
Foreign Exchange	Foreign Exchange: Foreign exchange transaction and revaluation (losses) gains were ($1.9) million and ($7.6) million for the three-month and nine-month periods ended September 30, 2017, respectively, and $0.3 million and ($3.1) million for the three-month and nine-month periods ended September 30, 2016, respectively, and were included in Other (expenses) income, net, in our consolidated statements of income, with the unrealized portion included in Other, net, in our condensed consolidated statements of cash flows.