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Notes Receivable (Tables)
 12 Months Ended
Dec. 31, 2015
Accounts and Notes Receivable, Net [Abstract]  
Schedule of Investment Income
We recorded the following amounts of interest income on the Allerton Loan (in thousands):
 
Year Ended December 31, 2014
 
Year Ended December 31, 2013
Contractual interest income
$
1,317

 
$
3,456

Amortization of discount
1,075

 
2,602

Total interest income
$
2,392

 
$
6,058