Real Estate Investments (Impairment of Real Estate Investments) (Narrative) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) restaurant	Jun. 30, 2015 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of restaurants owned by tenant | restaurant	59
Impairment charges	$ 169,342	$ 85,300
Reported Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of real estate assets deemed to be impaired	641,900	319,300
Estimated fair value of real estate assets deemed to be impaired	$ 472,600	$ 234,000
Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Period for determining disposal is more likely than not	12 months
Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Period for determining disposal is more likely than not	24 months