Segments (Schedule of Segment Reporting Information by Segment) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Rental revenues	$ 30,753,000	$ 31,003,000
Financing revenues	4,653,000	3,837,000
Total segment revenues	167,201,000	163,169,000
Interest expense	24,969,000	25,295,000
Depreciation and amortization	8,783,000	8,836,000
Income before income taxes	33,714,000	30,190,000
Corporate and Other
Segment Reporting Information [Line Items]
Interest expense	29,000,000	29,500,000
Franchise Operations
Segment Reporting Information [Line Items]
Franchise revenues	115,500,000	111,900,000
Depreciation and amortization	2,600,000	2,800,000
Income before income taxes	86,100,000	83,700,000
Company Restaurants
Segment Reporting Information [Line Items]
Company restaurant sale revenue	16,300,000	16,500,000
Interest expense	100,000	100,000
Depreciation and amortization	500,000	500,000
Income before income taxes	0	200,000
Rental Operations
Segment Reporting Information [Line Items]
Rental revenues	30,700,000	31,000,000
Interest expense	3,900,000	4,100,000
Depreciation and amortization	3,400,000	3,400,000
Income before income taxes	6,900,000	6,700,000
Financing Operations
Segment Reporting Information [Line Items]
Financing revenues	4,700,000	3,800,000
Income before income taxes	4,100,000	3,800,000
Corporate
Segment Reporting Information [Line Items]
Interest expense	25,000,000	25,300,000
Depreciation and amortization	2,300,000	2,100,000
Income before income taxes	$ (63,400,000)	$ (64,200,000)