Segments (Schedule of Segment Reporting Information by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Rental revenues	$ 31,409	$ 31,402
Financing revenues	2,329	2,594
Total revenues	163,524	175,814
Interest expense	18,600	19,200
Depreciation and amortization	8,074	7,815
Income (loss) before income tax provision:	41,105	46,092
Operating Segments | Franchise Operations
Segment Reporting Information [Line Items]
Franchise revenues	125,000	124,500
Depreciation and amortization	2,600	2,600
Income (loss) before income tax provision:	89,300	89,000
Operating Segments | Rental Operations
Segment Reporting Information [Line Items]
Rental revenues	31,400	31,400
Interest expense	3,100	3,500
Depreciation and amortization	3,200	3,200
Income (loss) before income tax provision:	8,200	7,900
Operating Segments | Company Restaurants
Segment Reporting Information [Line Items]
Company restaurants	4,800	17,300
Interest expense	100	100
Depreciation and amortization	100	200
Income (loss) before income tax provision:	(400)	800
Operating Segments | Financing Operations
Segment Reporting Information [Line Items]
Financing revenues	2,300	2,600
Income (loss) before income tax provision:	2,300	2,600
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Interest expense	15,400	15,600
Depreciation and amortization	2,200	1,800
Income (loss) before income tax provision:	$ (58,300)	$ (54,200)