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Facility Operating Leases (Tables)
12 Months Ended
Dec. 31, 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 are as follows (dollars in thousands):

 
 
For the Years Ended
December 31,
 
 
 
2012
 
 
2011
 
 
2010
 
Cash basis payment
 
$
281,729
 
 
$
270,623
 
 
$
264,727
 
Straight-line expense
 
 
6,668
 
 
 
8,608
 
 
 
10,521
 
Amortization of deferred gain
 
 
(4,372
)
 
 
(4,373
)
 
 
(4,343
)
Facility lease expense
 
$
284,025
 
 
$
274,858
 
 
$
270,905