Real Estate Investments (Details)	3 Months Ended
	Mar. 31, 2017 USD ($) state restaurant property	Dec. 31, 2016 USD ($)
Property Subject to or Available for Operating Lease [Line Items]
Total real estate investments	$ 1,490,613,000	$ 1,477,565,000
Less: Accumulated depreciation	(586,486,000)	(583,307,000)
Total real estate investments, net	904,127,000	894,258,000
Contingent consideration	$ 0
Number of restaurants | restaurant	299
Number of states in which entity operates | state	44
Property Subject to Operating Lease [Member]
Property Subject to or Available for Operating Lease [Line Items]
Land	$ 425,401,000	421,941,000
Buildings and improvements	926,560,000	916,444,000
Equipment	138,652,000	139,180,000
Total real estate investments	1,490,613,000	1,477,565,000
Less: Accumulated depreciation	(586,486,000)	(583,307,000)
Total real estate investments, net	904,127,000	$ 894,258,000
Payments to acquire business	17,500,000
Payments to acquire land	4,200,000
Payments to acquire buildings and improvements	12,600,000
Payments to acquire intangible assets	$ 700,000
Number of restaurants | property	9
Number of states in which entity operates | state	6
Operating leases, term of contract (in years)	13 years 6 months