Goodwill and Other Intangibles Pro Forma Omni Acquisition (Details) - Omni Air [Member] $ in Thousands	3 Months Ended
Mar. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Business Acquisition, Pro Forma Revenue	$ 305,856
Business Acquisition, Pro Forma Net Income (Loss)	21,413
Depreciation	$ 2,600

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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