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Note Receivable Backed by Real Estate	9 Months Ended
Note Receivable Backed by Real Estate	Sep. 30, 2015
Receivables [Abstract]
Note Receivable Backed by Real Estate	Note 6. Note Receivable Backed by Real Estate In February 2015, we received a $197.5 million note backed by real estate in connection with the disposition of real estate to a third party. We earn interest at an annual rate of 2.0%. The note and all accrued interest are due in February 2016.