Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Goodwill - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
Goodwill - Narrative (Details) - USD ($)	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Goodwill [Line Items]
Impairment charges					$ 59,500,000
Aviation
Goodwill [Line Items]
Impairment charges	$ 59,500,000	$ 0	$ 59,500,000	$ 0	$ 59,500,000