Equipment Held for Operating Lease - Leased Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	$ 1,886,613	$ 1,650,918
Month-to-month leases
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	339,868
Leases expiring 2021
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	208,302
Lease expiring 2022
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	526,244
Leases expiring 2023
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	252,186
Leases expiring 2024
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	78,496
Leases expiring 2025
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	44,430
Leases expiring thereafter
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	28,218
Off-lease and other
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	408,869	214,584
Europe
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	460,664	554,529
United States
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	362,471	240,454
Asia
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	324,946	427,246
Mexico
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	168,593	51,573
South America
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	104,671	110,563
Middle East
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	47,899	26,732
Canada
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	8,500	22,640
Africa
Lessor, Lease, Description [Line Items]
Net book value of equipment held for operating lease	$ 0	$ 2,597