Accounting for the Impairment or Disposal of Long-Lived Assets (Assets Held for Sale) (Details) - Disposal Group, Held-for-sale, Not Discontinued Operations [Member] - Florida [Member] - Land [Member]	Dec. 31, 2016 a parcel
Long Lived Assets Held-for-sale [Line Items]
Number of properties | parcel	2
Area of land | a	12.5