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Derivatives and Hedging (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2014 | Jun. 30, 2015 | Dec. 31, 2014
Forward foreign exchange contracts | Level 2 |  |  |  |
Derivative |  |  |  |
Estimated asset of contracts designated as hedging instruments, fair value |  |  | $ 0.6 | $ 1.1
Interest Rate Swap Agreements | Floating Rate Floor Plan Debt |  |  |  |
Derivative |  |  |  |
Increase in the weighted average interest rate on floor plan borrowings due to the swaps (as a percent) | 0.28% | 0.28% |  |
Interest Rate Swap Agreements | Floating Rate Floor Plan Debt | LIBOR portion |  |  |  |
Derivative |  |  |  |
Portion of floating rate floor plan debt fixed by swap agreements |  |  |  | $ 300.0
Interest rate swap, fixed (as a percent) |  |  |  | 2.135%
Interest Rate Swap Agreements | Floating Rate Floor Plan Debt | Fixed rate portion |  |  |  |
Derivative |  |  |  |
Portion of floating rate floor plan debt fixed by swap agreements |  |  |  | $ 100.0
Interest rate swap, fixed (as a percent) |  |  |  | 1.55%

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- Definition Fair value of asset associated with financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226003-175313 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959 + Details
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