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Summarized Quarterly Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2011
Summarized Quarterly Data (Unaudited) [Abstract]  
Summarized Quarterly Data (Unaudited)
Summarized Quarterly Data (Unaudited)
 
 
Year ended December 31, 2011 Quarters
 
1st
 
2nd(4)
 
3rd(5)
 
4th
 
Total
 
(In thousands, except per share data)
Revenue
$
224,323

 
$
228,785

 
$
215,988

 
$
226,987

 
$
896,083

Gross profit
$
87,394

 
$
92,142

 
$
75,356

 
$
67,039

 
$
321,931

Net income
$
12,439

 
$
16,565

 
$
14,838

 
$
4,308

 
$
48,150

Net income per common share(1)
 
 
 
 
 
 
 
 

Basic
$
0.08

 
$
0.10

 
$
0.09

 
$
0.03

 
$
0.29

Diluted
$
0.07

 
$
0.10

 
$
0.09

 
$
0.03

 
$
0.28

 
Year ended December 31, 2010 Quarters
 
1st
 
2nd
 
3rd(2)
 
4th(3)
 
Total
 
(In thousands, except per share data)
Revenue
$
180,838

 
$
207,478

 
$
236,998

 
$
253,389

 
$
878,703

Gross profit
$
68,499

 
$
85,483

 
$
97,959

 
$
98,897

 
$
350,838

Net income
$
13,709

 
$
22,459

 
$
112,175

 
$
42,494

 
$
190,837

Net income per common share(1)
 
 
 
 
 
 
 
 
 
Basic
$
0.09

 
$
0.14

 
$
0.72

 
$
0.27

 
$
1.22

Diluted
$
0.09

 
$
0.14

 
$
0.69

 
$
0.25

 
$
1.17

 ______________
(1)
Earnings per share is computed individually for each of the quarters presented; therefore, the sum of the quarterly earnings per share may not necessarily equal the total for the year.
(2)
During the third quarter of 2010, the Company recorded a tax benefit of $73,367 due to the release of the valuation allowance.
(3)
During the fourth quarter of 2010, the Company received $1,340 for the recovery of a previously impaired investment. The Company also recorded a tax benefit of $4,436 primarily due to the recognition of a deferred tax asset related to R&E credits resulting from a change in the tax legislation that was passed at the end of 2010.
(4)
During the second quarter of 2011, the Company recorded a tax benefit of $2,183 resulting from the release of certain liabilities due to the expiration of statute of limitations.
(5)
During the third quarter of 2011, the Company recorded a tax benefit of $5,811 resulting from the release of certain liabilities due to the expiration of statute of limitations and the recognition of additional tax credits for 2010 related to R&E spending.