Intangibles Narrative (Details) $ in Thousands	Dec. 31, 2016 USD ($) sites community	Dec. 31, 2015 USD ($)
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 133,385	$ 64,845
Number of Units in Real Estate Property | sites	117,376
Ground Lease [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 33,270	0
Leases, Acquired-in-Place [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	98,235	62,981
Franchise Rights [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,880	$ 1,864
Carefree Communities | Ground Lease [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 33,300
Number of Units in Real Estate Property | community	5