| **LEASED VEHICLES, NET (Components of Leased Vehicles, Net) (Details) - USD ($) $ in Thousands**                                                                                                                                                                                                                                                                                                                                                                    | Mar. 31, 2016 | Dec. 31, 2015 |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------|---------------|
| **Leases [Abstract]**                                                                                                                                                                                                                                                                                                                                                                                                                                               |               |          |   |
| Leased vehicles                                                                                                                                                                                                                                                                                                                                                                                                                                                     |               | $ 12,284,996  | $ 11,332,226 |
| Origination fees and other costs                                                                                                                                                                                                                                                                                                                                                                                                                                    |               | 30,127        | 29,798 |
| Manufacturer subvention payments, net of accretion                                                                                                                                                                                                                                                                                                                                                                                                                  |               | (1,153,958)   | (1,061,501) |
| Leased vehicles, gross                                                                                                                                                                                                                                                                                                                                                                                                                                              |               | 11,161,165    | 10,300,523 |
| Less: accumulated depreciation                                                                                                                                                                                                                                                                                                                                                                                                                                      |               | (2,180,635)   | (1,911,693) |
| Leased vehicles, net                                                                                                                                                                                                                                                                                                                                                                                                                                                | [1],[2]       | $ 8,980,530   | $ 8,388,830 |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| [1]Net of accumulated depreciation of $2.2 billion and $1.9 billion at March 31, 2016 and December 31, 2015, respectively.[2]The Company has interests in certain securitization trusts ("Trusts") that are considered variable interest entities ("VIEs") for accounting purposes. The Company consolidates VIEs where it is deemed the primary beneficiary. See Note 6 to these Condensed Consolidated Financial Statements for additional information. |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Property Subject to or Available for Operating Lease, Gross, Including Initial Direct Costs and Manufacturer Subvention Payments
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                      |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Property Subject to or Available for Operating Lease, Manufacturer Subvention Payments
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Property Subject to or Available for Operating Lease, Origination Fees and Other Costs
+ References
No definition available.
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| X                                                                                                                                                                                        |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of accumulated depreciation, by major property class, recorded on property subject to or available for lease as of the balance sheet date.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount before accumulated depreciation of physical assets used in the normal conduct of business to produce goods and services subject to or available for lease.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of property, by major property class, net of accumulated depreciation, subject to or available for lease as of the balance sheet date.
+ References
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