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Facility Operating Leases (Tables)
9 Months Ended
Sep. 30, 2012
Facility Operating Leases [Abstract]  
Summary of facility operating leases
A summary of facility lease expense and the impact of straight-line adjustment and amortization of deferred gains is as follows (dollars in thousands):
 
 
 
 
Three Months Ended
September 30,
  
Nine Months Ended
September 30,
 
 
2012
  
2011
  
2012
  
2011
 
Cash basis payment
 
$
70,142
  
$
67,584
  
$
211,195
  
$
198,968
 
Straight-line expense
  
2,118
   
1,824
   
5,324
   
5,006
 
Amortization of deferred gain
  
(1,093
)
  
(1,094
)
  
(3,279
)
  
(3,280
)
Facility lease expense
 
$
71,167
  
$
68,314
  
$
213,240
  
$
200,694