Segments (Schedule of Segment Reporting Information by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Rental revenues	$ 30,465	$ 31,409
Financing revenues	2,131	2,329
Total revenues	156,174	163,524
Interest expense	18,200	18,600
Depreciation and amortization	7,706	8,074
Segment profit	24,225	41,105
Operating Segments
Segment Reporting Information [Line Items]
Segment profit	92,500	99,400
Operating Segments | Franchise Operations
Segment Reporting Information [Line Items]
Franchise revenues	119,500	125,000
Depreciation and amortization	2,700	2,600
Segment profit	82,800	89,300
Operating Segments | Rental Operations
Segment Reporting Information [Line Items]
Rental revenues	30,500	31,400
Interest expense	2,700	3,100
Depreciation and amortization	3,000	3,200
Segment profit	7,800	8,200
Operating Segments | Company Restaurants
Segment Reporting Information [Line Items]
Company restaurants	4,100	4,800
Interest expense	100	100
Depreciation and amortization	100	100
Segment profit	(200)	(400)
Operating Segments | Financing Operations
Segment Reporting Information [Line Items]
Financing revenues	2,100	2,300
Segment profit	2,100	2,300
Corporate
Segment Reporting Information [Line Items]
Interest expense	15,400	15,400
Depreciation and amortization	1,900	2,200
Segment profit	$ (68,300)	$ (58,300)