Long-Term Debt (Details Textual) (USD $)	12 Months Ended				12 Months Ended																		12 Months Ended		12 Months Ended			12 Months Ended			12 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Acquisition Line [Member]	Dec. 31, 2013 Real Estate Credit Facility, Real Estate Related Debt and Acquisition Line [Member]	Dec. 31, 2012 Real Estate Credit Facility, Real Estate Related Debt and Acquisition Line [Member]	Dec. 31, 2011 Real Estate Credit Facility, Real Estate Related Debt and Acquisition Line [Member]	Dec. 31, 2013 2.25% Warrants [Member]	Dec. 31, 2013 3.00% Convertible Notes due 2020	Dec. 31, 2012 3.00% Convertible Notes due 2020	Dec. 31, 2011 3.00% Convertible Notes due 2020	Dec. 31, 2013 Real Estate Credit Facility [Member]	Dec. 31, 2013 Foreign Note [Member]	Dec. 31, 2013 2.25% Convertible Notes due 2036	Dec. 31, 2012 2.25% Convertible Notes due 2036	Dec. 31, 2011 2.25% Convertible Notes due 2036	Dec. 31, 2013 2.25% Purchased Options [Member]	Dec. 31, 2013 3.00% Warrants [Member]	Dec. 31, 2013 3.00% Purchased Options [Member]	Dec. 31, 2013 Real Estate Related Debt [Member]	Dec. 31, 2013 Real Estate Related Debt [Member] Minimum [Member]	Dec. 31, 2013 Real Estate Related Debt [Member] Maximum [Member]	Dec. 31, 2013 Real Estate Related Debt [Member] Third-party financial institution [Member]	Dec. 31, 2012 Real Estate Related Debt [Member] Third-party financial institution [Member]	Dec. 31, 2013 Real Estate Related Debt [Member] Toyota Motor Credit Corporation [Member]	Jun. 30, 2013 Real Estate Related Debt [Member] Toyota Motor Credit Corporation [Member]	Dec. 31, 2012 Real Estate Related Debt [Member] Toyota Motor Credit Corporation [Member]	Dec. 31, 2013 Real Estate Related Debt [Member] Mercedes-Benz Financial Services [Member]	Jun. 30, 2013 Real Estate Related Debt [Member] Mercedes-Benz Financial Services [Member]	Dec. 31, 2012 Real Estate Related Debt [Member] Mercedes-Benz Financial Services [Member]	Dec. 31, 2013 Real Estate Related Debt [Member] BMW Financial Services [Member]	Jun. 30, 2013 Real Estate Related Debt [Member] BMW Financial Services [Member]	Dec. 31, 2012 Real Estate Related Debt [Member] BMW Financial Services [Member]	Dec. 31, 2013 Real Estate Related Debt [Member] Ford Motor Credit Company [Member]	Dec. 31, 2013 Convertible Notes [Member]	Dec. 31, 2012 Convertible Notes [Member]	Dec. 31, 2011 Convertible Notes [Member]	Dec. 31, 2013 Original terms [Member] Revolving Credit Facility [Member]	Dec. 31, 2013 Amended terms [Domain] Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Short-term Debt	$ 800,000	$ 8,700,000
Long Term Debt (Textual) [Abstract]
Debt interest rate									3.00%					2.25%			2.25%	3.00%	3.00%
Term of warrants																		10 years
Underwriters Fees Recorded as Reduction of Senior Notes Balance														6,400,000
Debt Instrument, Convertible, If-converted Value in Excess of Principal									104,000,000					36,000,000
Conversion of Stock, Shares Converted									25.899					0
Interest rate thereafter														2.00%
Debt instrument call date latest														Jun. 15, 2026
Debt instrument call date earliest														Jun. 15, 2016
Maturity date of of notes									Mar. 15, 2020					Jun. 15, 2036
Minimum percentage of conversion price to be considered to redeem all or part of the notes									130.00%					130.00%
Minimum trading days for conversion price									20 days					20 days
Maximum trading days for conversion price under redemption condition									30 days					30 days
Percentage of principal amount to be redeemed plus accrued and unpaid interest to but excluding redemption date									100.00%					100.00%
Initial Conversion rate of common stock														16.8577
Number of common shares to be issued for per $ 1,000 principal amount of note									26.809
Principal amount of note to be considered under conversion rate									1,000
Conversion price per share														$ 59.32				$ 37.30
Initial conversion price per share									$ 38.61					$ 59.43
Threshold closing price under redemption condition one									$ 48.49					$ 77.12
Maximum closing sale price under condition two									98.00%					98.00%
Each principal amount of notes converted														1,000
Number of trading days as observation period for determined weighted price of company's common stock									25 days
Conversion value in cash														1,000
Warrant exercisable								3,100,000										3,100,000
Dividend threshold for adjustment to conversion price								$ 0.14
Premium to closing price																		80.00%
Cost of options recorded as reduction to additional paid-in capital																			45,900,000
Amortization period for underwriters fees									10 years					10 years
Deferred Finance Costs, Gross									500,000
Amortization Period For Debt Issuance Cost									10 years					10 years
Right to purchase common stock																	3,100,000		3,100,000
Period for warrants sold								10 years
Amortized Underwriter's fees									3,500,000
Maximum number of shares of common stock required to be issued under warrants								6,200,000										5,500,000
Sale of equity warrants								80,600,000										29,309,000
Average annual impact of accounting for convertible debt									400,000					600,000
Exercise price per common stock under warrants								80.16										54.81
Assessment period for fair value	10 years
Note agreement with a third party financial institution									115,000,000	115,000,000				182,753,000	182,753,000								77,500,000
Redemption premium												3,400,000
Line of Credit Facility, Amount Outstanding	1,068,832,000			60,000,000
Debt extinguishment cost														300,000
Revolving syndicated credit arrangement																																						1,350,000,000	1,700,000,000
Term loans provided under credit facility												74,100,000
Amount available to be expanded												99,100,000
Capitalization of debt issuance costs												1,100,000								1,300,000
Unamortized debt issuance cost									236,000	264,000		600,000		33,000	45,000					700,000
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%
Principal payments on outstanding borrowings												8,600,000
Borrowings under amended and restated mortgage facility												67,700,000
Interest on real estate notes, minimum																				3.67%
Interest on real estate notes, maximum																				9.00%
Amortization Cost of Mortgage Facility, Real Estate Related Debt and Acquisition Line	13,888,000	12,990,000	11,990,000		500,000
Impact of interest rate derivative instruments related to Mortgage Facility	1,200,000	1,200,000	1,000,000
Total interest expense excluding amortization cost					13,100,000	12,700,000	11,200,000		3,450,000	3,450,000	3,461,000			4,112,000	4,112,000	4,119,000																			7,600,000	7,600,000	7,600,000
Total borrowings													37,700,000
Amortization schedule																									20 years			20 years			15 years
Amortization cost of the 3.00% notes, 2.25% Notes and 8.25% Notes									3,251,000	2,966,000	2,706,000			7,530,000	6,948,000	6,409,000																			11,100,000	10,200,000	9,400,000
Variable Interest Rate												2.00%									1.95%	3.35%
Total borrowings																							69,800,000	54,800,000	51,600,000		48,000,000	45,500,000		47,100,000	70,100,000		76,300,000
Number of loans as per loan agreements																							11		8			3			14			1
Additional Borrowings												19,600,000																						5,400,000
Current maturities of long-term debt and short-term financing	36,225,000	31,358,000											10,400,000										3,800,000	3,200,000		7,000,000	5,300,000		1,700,000	1,600,000		4,100,000	4,100,000	200,000
Treasury stock value acquired cost method	3,554,000	11,317,000	50,777,000
Interest costs capitalized on construction projects		700,000	600,000											800,000
Total interest expense related to capital leases, net of interest income	$ 5,500,000	$ 5,300,000	$ 4,000,000