Accounting for the Impairment or Disposal of Long-Lived Assets Accounting for the Impairment or Disposal of Long-Lived Assets - Assets Held for Sale (Details) (Other Segments [Member])	Dec. 31, 2014 sqft bldg
Other Segments [Member]
Long Lived Assets Held-for-sale [Line Items]
Number of Real Estate Properties	1
Square Footage of Real Estate Property	83,000