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Derivative Instruments and Risk Management Activities Derivative Instruments and Risk Management Activities (Policies) | 9 Months Ended
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Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Derivatives, Policy [Policy Text Block] | The periodic interest rates of the Revolving Credit Facility (as defined in Note 8, “Credit Facilities”) and certain variable-rate real estate related borrowings in the U.S. are indexed to the one-month London Inter Bank Offered Rate (“LIBOR”), plus an associated company credit risk rate. In order to minimize the earnings variability related to fluctuations in these periodic interest rates, the Company employs an interest rate hedging strategy, whereby it enters into arrangements with various financial institutional counterparties with investment grade credit ratings, swapping its variable interest rate exposure for a fixed interest rate over terms not to exceed the related variable-rate debt. The Company presents the fair value of all interest rate derivative instruments on its Consolidated Balance Sheets. The Company measures the fair value of its interest rate derivative instruments utilizing an income approach valuation technique, converting future amounts of cash flows to a single present value in order to obtain a transfer exit price within the bid and ask spread that is most representative of the fair value of its derivative instruments. In measuring fair value, the Company utilizes the option-pricing Black-Scholes present value technique for all of its derivative instruments. This option-pricing technique utilizes a one-month LIBOR forward yield curve, obtained from an independent external service provider, matched to the identical maturity term of the instrument being measured. Observable inputs utilized in the income approach valuation technique incorporate identical contractual notional amounts, fixed coupon rates, periodic terms for interest payments and contract maturity. The fair value estimate of the interest rate derivative instruments also considers the credit risk of the Company for instruments in a liability position or the counterparty for instruments in an asset position. The credit risk is calculated by using the spread between the one-month LIBOR yield curve and the relevant average 10 and 20-year rate according to Standard and Poor’s. The Company has determined the valuation measurement inputs of these derivative instruments to maximize the use of observable inputs that market participants would use in pricing similar or identical instruments and market data obtained from independent sources, which is readily observable or can be corroborated by observable market data for substantially the full term of the derivative instrument. Further, the valuation measurement inputs minimize the use of unobservable inputs. Accordingly, the Company has classified the derivatives within Level 2 of the hierarchy framework as described by Accounting Standards Codification ("ASC") 820, Fair Value Measurement. The related gains or losses on these interest rate derivative instruments are deferred in stockholders’ equity as a component of accumulated other comprehensive loss. These deferred gains and losses are recognized in income in the period in which the related items being hedged are recognized in expense. However, to the extent that the change in value of a derivative contract does not perfectly offset the change in the value of the items being hedged, that ineffective portion is immediately recognized in other income or expense. Monthly contractual settlements of these swap positions are recognized as floorplan or other interest expense in the Company’s accompanying Consolidated Statements of Operations. All of the Company’s interest rate derivative instruments are designated as cash flow hedges.

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- Definition Disclosure of accounting policy for its derivative instruments and hedging activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=68058157&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41620-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579240-113959 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41675-113959 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41638-113959 + Details
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