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Related-party arrangements (Tables)
6 Months Ended
Jun. 30, 2016
Schedule of Lease Payments to the Mann Foundation

Lease payments to the Mann Foundation for the three and six months ended June 30, 2016 and 2015 were as follows (in thousands):

 

     Three months ended
June 30,
     Six months ended
June 30,
 
     2016      2015      2016      2015  

Lease payments

   $ 67       $ 65       $ 133       $ 65