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Facility Operating Leases (Tables)
6 Months Ended
Jun. 30, 2013
Facility Operating Leases [Abstract]  
Summary of facility operating leases
The following table provides a summary of facility lease expense and the impact of straight-line adjustment and amortization of deferred gains (dollars in thousands):

 
Three Months Ended
June 30,
  
Six Months Ended
June 30,
 
 
2013
  
2012
  
2013
  
2012
 
Cash basis payment
 
$
69,186
  
$
70,157
  
$
138,550
  
$
141,053
 
Straight-line expense
  
684
   
1,564
   
1,432
   
3,206
 
Amortization of deferred gain
  
(1,093
)
  
(1,093
)
  
(2,186
)
  
(2,186
)
Facility lease expense
 
$
68,777
  
$
70,628
  
$
137,796
  
$
142,073