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Lease Exit Liability (Tables)
9 Months Ended
Sep. 30, 2015
Lease Exit Liability [Abstract]  
Changes in Lease Exit Liability
Changes in the lease exit liability are as follows (in thousands):

Accrual balance at December 31, 2014
 
$
8,006
 
Principal payments
  
(2,833
)
Accrual balance at September 30, 2015
 
$
5,173