text: We maintain an allowance, or reserve, for doubtful casino accounts at all of our 
  operating casino resorts. The provision for doubtful accounts, an operating expense, 
  increases the allowance for doubtful accounts. We regularly evaluate the allowance 
  for doubtful casino accounts. At resorts where marker play is not significant, the 
  allowance is generally established by applying standard reserve percentages to aged 
  account balances. At resorts where marker play is significant, we apply standard 
  reserve percentages to aged account balances under a specified dollar amount and 
  specifically analyze the collectibility of each account with a balance over the specified 
  dollar amount, based on the age of the account, the customer’s financial condition, 
  collection history and any other known information. We also monitor regional and 
  global economic conditions and forecasts to determine if reserve levels are adequate. 