Segment Information (Detail) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Segment Reporting Information [Line Items]
Revenues	$ 482,700	$ 444,999	$ 1,015,365	$ 940,268
Earnings Before Income Taxes	17,627	39,329	89,546	98,891
Sales and Lease Ownership
Segment Reporting Information [Line Items]
Revenues	459,796	422,564	972,794	896,062
Earnings Before Income Taxes	2,234	35,076	59,451	80,819
Franchise
Segment Reporting Information [Line Items]
Revenues	15,176	14,147	31,519	29,074
Earnings Before Income Taxes	11,846	11,013	24,762	22,543
Other
Segment Reporting Information [Line Items]
Revenues	3,019	4,508	5,969	9,403
Earnings Before Income Taxes	(467)	(7,262)	857	(8,075)
Manufacturing
Segment Reporting Information [Line Items]
Revenues	20,713	14,199	49,122	39,219
Earnings Before Income Taxes	(73)	355	1,318	1,552
Revenues of Reportable Segments
Segment Reporting Information [Line Items]
Revenues	498,704	455,418	1,059,404	973,758
Earnings Before Income Taxes	13,540	39,182	86,388	96,839
Elimination of Intersegment Revenues
Segment Reporting Information [Line Items]
Revenues	(20,905)	(14,390)	(49,496)	(39,600)
Earnings Before Income Taxes	73	(355)	(1,318)	(1,554)
Cash to Accrual Adjustments
Segment Reporting Information [Line Items]
Revenues	4,901	3,971	5,457	6,110
Earnings Before Income Taxes	$ 4,014	$ 502	$ 4,476	$ 3,606