Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

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- Definition

The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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No definition available.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

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Total cost of shares repurchased divided by the total number of shares repurchased.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
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Note 21 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands					12 Months Ended			53 Months Ended
	Feb. 26, 2016	Feb. 22, 2016	Feb. 01, 2016	Jan. 26, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015
Subsequent Event [Member] \| Common Class A [Member] \| Share Repurchase Plan [Member]
Stock Repurchased During Period, Shares	594,123
Treasury Stock Acquired, Average Cost Per Share	$ 79.11
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	677,364
Subsequent Event [Member] \| Common Class A [Member]
Common Stock, Dividends, Per Share, Declared		$ 0.20
Subsequent Event [Member] \| Common Class B [Member]
Common Stock, Dividends, Per Share, Declared		$ 0.20
Subsequent Event [Member] \| Riverside Subaru [Member]
Payments to Acquire Businesses, Net of Cash Acquired				$ 3,600
Subsequent Event [Member] \| Ira Toyota / Scion [Member]
Payments to Acquire Businesses, Net of Cash Acquired			$ 6,500
Subsequent Event [Member]
Dividends, Common Stock, Cash		$ 5,100
Common Class A [Member] \| Share Repurchase Plan [Member]
Treasury Stock Acquired, Average Cost Per Share					$ 107.88	$ 70.52	$ 40.76
Common Class A [Member]
Stock Repurchased During Period, Shares					228,737	226,729	127,900	1,700,000
Treasury Stock Acquired, Average Cost Per Share								$ 41.34
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased					1,300,000			1,300,000
Payments to Acquire Businesses, Net of Cash Acquired					$ 71,615	$ 659,634	$ 81,105