text: There are several estimates, assumptions and decisions in measuring impairments of 
  long-lived assets. First, management must determine the usage of the asset. To the 
  extent management decides that an asset will be sold, it is more likely that an 
  impairment may be recognized. Assets must be tested at the lowest level for which 
  identifiable cash flows exist. This means that some assets must be grouped, and man- 
  agement has some discretion in the grouping of assets. Future cash flow estimates are, 
  by their nature, subjective and actual results may differ materially from our estimates. 