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Operating Leases (Tables)
 12 Months Ended
Dec. 31, 2011
Leases [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases
Future minimum lease payments are as follows:
 

2012
 
2013
 
2014
 
2015
 
2016
 
Thereafter
 
Total
 
(In thousands)
Minimum lease payments
$
8,498

 
$
9,074

 
$
9,410

 
$
9,721

 
$
9,786

 
$
57,589

 
$
104,078

Minimum sublease rentals
(295
)
 
(304
)
 
(128
)
 
—

 
—

 
—

 
(727
)

$
8,203

 
$
8,770

 
$
9,282

 
$
9,721

 
$
9,786

 
$
57,589

 
$
103,351