Goodwill and Other Intangibles Pro Forma Omni Acquisition (Details) - Omni Air [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Business Acquisition, Pro Forma Revenue	$ 328,412	$ 962,069
Business Acquisition, Pro Forma Net Income (Loss)	32,144	86,273
Depreciation	$ 2,600	$ 7,900

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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