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Comprehensive Income
9 Months Ended
Sep. 30, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] 
Comprehensive Income
Comprehensive Income
The following table presents the calculation of comprehensive income and its components (in thousands):
 
 
For the Three Months
Ended September 30,
 
For the Nine Months
Ended September 30,
 
2011
 
2010
 
2011
 
2010
Net income
$
42,285

 
$
39,709

 
$
140,823

 
$
118,710

Other comprehensive income (loss):
 
 
 
 
 
 
 
Foreign currency translation adjustments
(5,588
)
 
6,581

 
(1,200
)
 
1,701

Change in unrealized gain (loss) on investments, net
(6,517
)
 
1,874

 
(3,840
)
 
5,864

Income tax expense related to unrealized gain (loss) on investments, net
2,507

 
(726
)
 
1,482

 
(2,272
)
Other comprehensive income (loss)
(9,598
)
 
7,729

 
(3,558
)
 
5,293

Comprehensive income
$
32,687

 
$
47,438

 
$
137,265

 
$
124,003


Accumulated other comprehensive income (loss) consisted of (in thousands):
 
September 30, 2011
 
December 31,
2010
Foreign currency translation adjustment
$
903

 
$
2,103

Net unrealized (loss) gain on investments, net of taxes of $6,487 at September 30, 2011 and $5,005 at December 31, 2010
(10,202
)
 
(7,844
)
Total accumulated other comprehensive income (loss)
$
(9,299
)
 
$
(5,741
)