Segment Information (Detail) (USD $) In Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Segment Reporting Information [Line Items]
Revenues	$ 485,195	$ 452,150	$ 1,500,560	$ 1,392,418
Earnings Before Income Taxes	45,092	42,085	134,638	140,976
Sales and Lease Ownership
Segment Reporting Information [Line Items]
Revenues	467,413	435,573	1,440,207	1,331,635
Earnings Before Income Taxes	39,523	33,493	98,974	114,312
Franchise
Segment Reporting Information [Line Items]
Revenues	15,889	14,537	47,408	43,611
Earnings Before Income Taxes	12,431	11,163	37,193	33,706
Other
Segment Reporting Information [Line Items]
Revenues	7,430	3,940	13,399	13,343
Earnings Before Income Taxes	(3,001)	(654)	(2,144)	(8,729)
Manufacturing
Segment Reporting Information [Line Items]
Revenues	17,178	17,591	66,300	56,810
Earnings Before Income Taxes	687	891	2,005	2,443
Reportable Segments
Segment Reporting Information [Line Items]
Revenues	507,910	471,641	1,567,314	1,445,399
Earnings Before Income Taxes	49,640	44,893	136,028	141,732
Elimination of Intersegment
Segment Reporting Information [Line Items]
Revenues	(17,369)	(17,783)	(66,865)	(57,383)
Earnings Before Income Taxes	(687)	(891)	(2,005)	(2,445)
Cash to Accrual and Other Adjustments
Segment Reporting Information [Line Items]
Revenues	(5,346)	(1,708)	111	4,402
Earnings Before Income Taxes	$ (3,861)	$ (1,917)	$ 615	$ 1,689

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 4

-Section 08

-Paragraph h

-Subparagraph 1(i)

Reference 2: 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.(h)(1)(i))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 1

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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