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SELECTED QUARTERLY FINANCIAL DATA (unaudited)
 12 Months Ended
Dec. 31, 2012
Selected Quarterly Financial Information [Abstract]  
SELECTED QUARTERLY FINANCIAL DATA (unaudited)
SELECTED QUARTERLY FINANCIAL DATA (unaudited)

 
 
For The Year Ended December 31, 2012
 
 
First quarter
 
Second quarter
 
 Third quarter
 
Fourth quarter
Revenue
 
$
200,590

 
$
204,838

 
$
187,873

 
$
184,276

Gross margin
 
$
73,208

 
$
77,068

 
$
67,666

 
$
66,925

Operating income (loss)
 
$
(3,702
)
 
$
(3,167
)
 
$
(1,600
)
 
$
1,831

Net income (loss)
 
$
(3,221
)
 
$
394

 
$
(2,165
)
 
$
(343
)
Basic earnings (loss) per share
 
$
(0.10
)
 
$
0.01

 
$
(0.07
)
 
$
(0.01
)
Diluted earnings (loss) per share
 
$
(0.10
)
 
$
0.01

 
$
(0.07
)
 
$
(0.01
)
Basic weighted average shares outstanding (in thousands)
 
31,765

 
32,122

 
32,156

 
32,169

Diluted weighted average shares outstanding (in thousands)
 
31,765

 
32,486

 
32,156

 
32,169

Common stock equivalents and outstanding stock options excluded from the calculation of diluted earnings (loss) per share (in thousands)
 
2,793

 
1,939

 
2,654

 
2,368

 
 
 
 
 
 
 
 
 
 
 
For The Year Ended December 31, 2011
 
 
First quarter
 
Second quarter
 
 Third quarter
 
Fourth quarter
Revenue
 
$
218,539

 
$
247,378

 
$
245,081

 
$
222,738

Gross margin
 
$
81,198

 
$
95,467

 
$
92,992

 
$
84,648

Operating income (loss)
 
$
463

 
$
6,030

 
$
6,150

 
$
4,792

Net income (loss)
 
$
(6
)
 
$
4,224

 
$
3,382

 
$
3,309

Basic earnings (loss) per share
 
$
—

 
$
0.13

 
$
0.11

 
$
0.10

Diluted earnings (loss) per share
 
$
—

 
$
0.13

 
$
0.11

 
$
0.10

Basic weighted average shares outstanding
 
31,325

 
31,593

 
31,620

 
31,639

Diluted weighted average shares outstanding
 
31,325

 
32,039

 
32,085

 
32,118

Common stock equivalents and outstanding stock options excluded from the calculation of diluted earnings (loss) per share (in thousands)
 
2,928

 
2,224

 
1,717

 
1,396



Earnings (loss) per share calculations for each quarter include the weighted average effect for the quarter; therefore, the sum of quarterly earnings (loss) per share amounts may not equal year-to-date earnings (loss) per share amounts, which reflect the weighted average effect on a year-to-date basis.