For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Lease Rental Revenues and Flight Equipment Held for Lease (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Lease Rental Revenue \| Customer Concentration Risk \| Customer Group One
Revenue, Major Customer [Line Items]
Percentage of geographic concentration	20.00%	27.00%
Maintenance Payments
Revenue, Major Customer [Line Items]
Amounts of lease incentive liabilities recorded in the consolidated balance sheets	$ 10,688		$ 9,176