Long-Term Debt (Details Textual) $ in Thousands, BRL in Millions	1 Months Ended	3 Months Ended			12 Months Ended
	Sep. 30, 2014 USD ($) shares	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 BRL	Sep. 02, 2014 USD ($)	Jun. 30, 2014 USD ($)	Jun. 25, 2014 USD ($)
Long Term Debt (Textual) [Abstract]
Lease Expiration Date		Jun. 01, 2034
Short-term Debt		$ 3,000			$ 3,000	$ 0
Number of manufacturer-affiliated finance partners		4			4			4
Borrowings Of Long Term Debt Related To Real Estate Loans					$ 32,026	111,979	$ 55,345
Properties owned by subsidiaries		3			3			3
Long-term Debt, Percentage Bearing Fixed Interest, Amount		$ 100,700			$ 100,700	158,100
Gains (Losses) on Extinguishment of Debt					0	(46,403)	0
Amortization Cost of Mortgage Facility, Real Estate Related Debt and Acquisition Line					3,652	10,559	13,888
Impact of interest rate derivative instruments related to Mortgage Facility					1,800	1,500	1,200
Total interest expense related to capital leases, net of interest income					7,600	7,500	5,500
Interest costs capitalized on construction projects					$ 700	$ 700	$ 800
Brazilian Financial Institutions [Member]
Long Term Debt (Textual) [Abstract]
Maturity date of notes					Feb. 01, 2017
Total borrowings | BRL								BRL 5.6
Number of loans as per loan agreements					1
Revolving Credit Facility [Member]
Long Term Debt (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity		1,700,000			$ 1,700,000
FMCC Facility [Member]
Long Term Debt (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity		300,000			$ 300,000
Variable Interest Rate					1.50%	1.50%
U.K. Note [Member]
Long Term Debt (Textual) [Abstract]
Total borrowings		57,100			$ 57,100	$ 45,300
Long-term Debt, Current Maturities		$ 4,500			$ 4,500	$ 5,000
Number of loans as per loan agreements					8
Repayments of Long-term Debt					$ 3,700
Borrowings Of Long Term Debt Related To Real Estate Loans					$ 17,400
Floorplan Line [Member]
Long Term Debt (Textual) [Abstract]
Debt, Weighted Average Interest Rate		1.70%			1.70%	1.40%		1.70%
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,600,000			$ 1,600,000
Capital Lease Obligations [Member]
Long Term Debt (Textual) [Abstract]
Debt, Weighted Average Interest Rate		9.80%			9.80%			9.80%
2.25% Convertible Notes due 2036
Long Term Debt (Textual) [Abstract]
Note agreement with a third party financial institution	$ 182,800								$ 182,500
Debt interest rate		2.25%			2.25%			2.25%
Repayments of Convertible Debt	$ 237,500
Debt Conversion, Converted Instrument, Shares Issued | shares	701,795
Convertible debt instrument conversion shares received | shares	421,309
Call options duration					10 years
Gains (Losses) on Extinguishment of Debt					$ 16,900
Debt Instrument, Interest Rate, Effective Percentage		7.50%			7.50%			7.50%
3.00% Convertible Notes due 2020
Long Term Debt (Textual) [Abstract]
Note agreement with a third party financial institution										$ 22,600	$ 115,000
Repayments of Convertible Debt			$ 49,500	$ 210,400
Gains (Losses) on Extinguishment of Debt			5,900	23,600
Debt Instrument, Interest Rate, Effective Percentage		8.25%			8.25%			8.25%
Debt Instrument, Repurchased Face Amount									$ 22,600	92,500
Proceeds from Warrant Exercises			$ 6,200	$ 26,400
3.00 Percent Purchased Options [Member]
Long Term Debt (Textual) [Abstract]
Debt interest rate		3.00%			3.00%			3.00%
3.00 Percent Warrants [Member]
Long Term Debt (Textual) [Abstract]
Debt interest rate		3.00%			3.00%			3.00%
3.00% Convertible Notes [Member]
Long Term Debt (Textual) [Abstract]
Debt interest rate		3.00%			3.00%			3.00%
Debt Instrument, Interest Rate, Effective Percentage		0.00%			0.00%	8.60%	8.60%	0.00%
Total interest expense excluding amortization cost					$ 0	$ 1,839	$ 3,450
Amortization cost of the 3.00% notes, 2.25% Notes, 5.00% Notes, and 5.25% Notes					0	1,810	3,251
Convertible and Senior Notes [Member]
Long Term Debt (Textual) [Abstract]
Total interest expense excluding amortization cost					28,500	17,000	7,600
Amortization cost of the 3.00% notes, 2.25% Notes, 5.00% Notes, and 5.25% Notes					1,500	8,000	11,100
Brazilian third party financial institution [Member]
Long Term Debt (Textual) [Abstract]
Repayments of Long-term Debt					8,600
Borrowings Of Long Term Debt Related To Real Estate Loans					$ 0
Brazil Note [Member]
Long Term Debt (Textual) [Abstract]
Maturity date of notes					Apr. 01, 2025
Total borrowings		$ 3,800			$ 3,800
Long-term Debt, Current Maturities		400			$ 400
U.K. Note [Member]
Long Term Debt (Textual) [Abstract]
Maturity date of notes					Sep. 01, 2034
5.00% Senior Note [Member]
Long Term Debt (Textual) [Abstract]
Note agreement with a third party financial institution	$ 200,000	$ 550,000			$ 550,000	550,000				$ 350,000
Debt interest rate		5.00%			5.00%			5.00%
Maturity date of notes					Jun. 01, 2022
Additional borrowings discount from face value		1.50%			1.50%			1.50%
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed					35.00%
Redemption price percentage of principal outstanding and accrued unpaid interest		105.00%			105.00%			105.00%
Redemption price percentage of principal redeemed		100.00%			100.00%			100.00%
Long-term Debt Underwriters Fees and Discount Original	$ 10,400
Amortization period of underwriters fees and debt issuance costs					8 years
Debt Instrument, Unamortized Discount		$ 8,700			$ 8,700
Debt Issuance Cost					2,600
Unamortized debt issuance cost		2,000			2,000
Long-term Debt, Fair Value		545,900			545,900
5.25% Senior Note [Member]
Long Term Debt (Textual) [Abstract]
Note agreement with a third party financial institution		$ 300,000			$ 300,000	$ 0
Debt interest rate		5.25%			5.25%			5.25%
Maturity date of notes					Dec. 15, 2023
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed					35.00%
Redemption price percentage of principal outstanding and accrued unpaid interest		105.25%			105.25%			105.25%
Redemption price percentage of principal redeemed		100.00%			100.00%			100.00%
Amortization period of underwriters fees and debt issuance costs					8 years
Debt Issuance Cost					$ 1,100
Unamortized debt issuance cost		$ 1,100			1,100
Long-term Debt Underwriters Fees		3,800			3,800
Debt Instrument, Unamortized Underwriters' Fees		3,700			3,700
Long-term Debt, Fair Value		297,800			297,800
Real Estate Credit Facility [Member]
Long Term Debt (Textual) [Abstract]
Debt Issuance Cost					1,100
Unamortized debt issuance cost		100			100
Available Borrowings Of Term Loans Under Real Estate Credit Facility		25,000			$ 25,000
Interest rate under condition second					0.95%
Interest rate under sub-condition two of condition second					0.50%
Interest rate under sub-condition three of condition second					1.05%
Percentage of principal payments to make its quarterly payment					1.25%
Additional Borrowings					$ 0
Principal payments on outstanding borrowings					3,300
Total borrowings		54,700			54,700
Long-term Debt, Current Maturities		29,100			$ 29,100
Variable Interest Rate					2.00%
Acquisition Line [Member]
Long Term Debt (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity		320,000			$ 320,000
Line of credit facility minimum borrowing capacity		100,000			$ 100,000
Variable Interest Rate					1.50%	1.50%
Real Estate Related Debt [Member]
Long Term Debt (Textual) [Abstract]
Debt Issuance Cost					$ 1,300
Unamortized debt issuance cost		263			$ 263
Interest on real estate notes, minimum					3.00%
Interest on real estate notes, maximum					4.69%
Real Estate Related Debt [Member] | Minimum [Member]
Long Term Debt (Textual) [Abstract]
Variable Interest Rate					1.50%
Real Estate Related Debt [Member] | Maximum [Member]
Long Term Debt (Textual) [Abstract]
Variable Interest Rate					2.55%
Real Estate Related Debt [Member] | Toyota Motor Credit Corporation [Member]
Long Term Debt (Textual) [Abstract]
Maturity date of notes					Aug. 01, 2022
Total borrowings		35,700			$ 35,700	$ 49,900
Long-term Debt, Current Maturities		1,500			$ 1,500	5,100
Number of loans as per loan agreements					7
Repayments of Long-term Debt					$ 14,300
Borrowings Of Long Term Debt Related To Real Estate Loans					$ 0
Amortization schedule					20 years
Real Estate Related Debt [Member] | Mercedes-Benz Financial Services [Member]
Long Term Debt (Textual) [Abstract]
Total borrowings						27,400
Long-term Debt, Current Maturities						7,600
Number of loans as per loan agreements					2
Repayments of Long-term Debt					$ 27,400
Real Estate Related Debt [Member] | BMW Financial Services [Member]
Long Term Debt (Textual) [Abstract]
Maturity date of notes					Oct. 01, 2021
Total borrowings		55,700			$ 55,700	66,000
Long-term Debt, Current Maturities		4,300			$ 4,300	4,500
Number of loans as per loan agreements					12
Repayments of Long-term Debt					$ 10,200
Borrowings Of Long Term Debt Related To Real Estate Loans					$ 0
Amortization schedule					15 years
Real Estate Related Debt [Member] | FMCC Facility [Member]
Long Term Debt (Textual) [Abstract]
Maturity date of notes					Dec. 10, 2024
Total borrowings		33,600			$ 33,600	35,100
Long-term Debt, Current Maturities		1,500			$ 1,500	1,400
Number of loans as per loan agreements					4
Repayments of Long-term Debt					$ 1,400
Borrowings Of Long Term Debt Related To Real Estate Loans					$ 0
Amortization schedule					20 years
Real Estate Related Debt [Member] | Third-party financial institution [Member]
Long Term Debt (Textual) [Abstract]
Note agreement with a third party financial institution		124,500			$ 124,500
Maturity date of notes					Nov. 30, 2022
Total borrowings		116,800			$ 116,800	115,200
Long-term Debt, Current Maturities		6,400			$ 6,400	6,500
Number of loans as per loan agreements					18
Repayments of Long-term Debt					$ 8,000
Borrowings Of Long Term Debt Related To Real Estate Loans					9,600
Fixed interest rate debt [Member]
Long Term Debt (Textual) [Abstract]
Long-term Debt, Fair Value		$ 102,400			102,400	186,400
Real Estate Credit Facility, Real Estate Related Debt and Acquisition Line [Member]
Long Term Debt (Textual) [Abstract]
Total interest expense excluding amortization cost					17,600	15,300	13,100
Amortization Cost of Mortgage Facility, Real Estate Related Debt and Acquisition Line					$ 0	$ 300	$ 500