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Loss on Disposal of Assets	9 Months Ended
Loss on Disposal of Assets	Sep. 30, 2020
Discontinued Operations and Disposal Groups [Abstract]
Loss on Disposal of Assets	Loss on Disposal of Assets During the nine months ended September 30, 2020, the Company had no loss on disposal of assets in the condensed consolidated statement of operations. During the nine months ended September 30, 2019, the Company recorded $16.9 million in loss on disposal of assets in the condensed consolidated statement of operations. This loss on disposal of assets consisted of $11.6 million related to the disposal of excess and obsolete inventory, $3.1 million related to the write-down of certain held-for-sale assets to fair value less cost to sell and $2.3 million related to the write-off of certain unrecoverable costs previously capitalized with a project to upgrade the Company's enterprise accounting software which was subsequently suspended as the Company pursued an alternative solution. Refer to Note 12, Fair Value Measurements for information regarding the Company's held-for-sale assets. These losses were partially offset by a $0.1 million gain on the sale-leaseback transaction for one aircraft in the period. Refer to Note 10, Leases for information regarding the Company's accounting policy on sale-leaseback transactions.