Subsequent Events (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Subsequent Events (Textuals) [Abstract]
Subsequent Event, Description	Genesis Restructuring. Subsequent to December 31, 2017, we entered into agreements with Genesis, our largest triple-net relationship, which included the following terms:
Term loan	$ 500,000
Real estate loans receivable	$ 495,871	$ 622,628
Genesis Master Lease [Member]
Subsequent Events (Textuals) [Abstract]
Reduction in rent effective date	Jan. 01, 2018
Reduction in rent	$ 35,000
Cash rent obligation extension period	5 years
Lease escalator in year 1	2.50%
Lease escalator thereafter	2.00%
Rent reset date	Jan. 31, 2023
Rent increase ceiling	$ 35,000
Genesis Term Loan [Member]
Subsequent Events (Textuals) [Abstract]
Term loan	120,000
Payments to fund longterm loans	24,000
Genesis Real Estate Loan [Member]
Subsequent Events (Textuals) [Abstract]
Real estate loans receivable	$ 267,000
Interest rate increase decrease effective date	Feb. 15, 2018
Incremental increase in interest rate	12.00%
Percentage of interest paid in cash	7.00%
Percentage of interest paid-in-kind	5.00%
Genesis Interest [Member]
Subsequent Events (Textuals) [Abstract]
Minimum commitments to repay	$ 105,000
Cash interest increase decrease date	Apr. 01, 2018
Cash interest increase decrease	$ 2,000