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Selected Quarterly Financial Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]  
Schedule of Quarterly Data
Unaudited quarterly financial data was as follows (in thousands, except per share data):

First
Quarter(1)

Second
Quarter(2)

Third
Quarter(3)

Fourth
Quarter(4)
Year ended December 31, 2016:







Revenues
$
293,908

 
$
297,686

 
$
308,524

 
$
321,802

Gross profit
54,414

 
61,190

 
66,318

 
71,242

Operating income (loss)
(4,139
)
 
8,145

 
20,505

 
26,315

Net income (loss)
(3,949
)
 
3,193

 
11,787

 
18,129

 
 
 
 
 
 
 
 
Basic earnings per share:
 
 
 
 
 
 
 
Net income (loss)
$
(0.11
)
 
$
0.10

 
$
0.35

 
$
0.52


 
 
 
 
 
 
 
Diluted earnings per share
 
 
 
 
 
 
 
Net income (loss)
$
(0.11
)
 
$
0.10

 
$
0.34

 
$
0.52


____________________
(1) 
Includes expenses of $9.7 million and $(0.2) million related to our 2016 Restructuring and 2014 Restructuring, respectively (see Note 3).
(2) 
Includes expenses of $3.8 million and $0.1 million related to our 2016 Restructuring and 2014 Restructuring, respectively (see Note 3).
(3) 
Includes expenses of $1.3 million and $(0.4) million related to our 2016 Restructuring and 2014 Restructuring, respectively (see Note 3).
(4) 
Includes expenses of $1.3 million and $0.3 million related to our 2016 Restructuring and 2014 Restructuring, respectively (see Note 3), and a gain on litigation settlement of $6.6 million (see Note 11).
 
 
First
Quarter(1)
 
Second
Quarter(2)
 
Third
Quarter(3)
 
Fourth
Quarter(4)
Year ended December 31, 2015:












Revenues

$
309,166

 
$
337,096

 
$
356,595

 
$
330,713

Gross profit

59,190

 
72,053

 
77,121

 
67,423

Operating income (loss)

9,125

 
14,523

 
24,938

 
(28,640
)
Net income (loss)

1,372

 
8,848

 
15,223

 
(33,433
)
 
 
 
 
 
 
 
 
 
Basic earnings per share:

 
 
 
 
 
 
 
Net income (loss)

$
0.04

 
$
0.24

 
$
0.41

 
$
(0.91
)
 
 
 
 
 
 
 
 
 
Diluted earnings per share

 
 
 
 
 
 
 
Net income (loss)

$
0.04

 
$
0.24

 
$
0.40

 
$
(0.91
)
____________________
(1) 
Includes expenses of $3.5 million related to our 2014 Restructuring (see Note 3).
(2) 
Includes expenses of $5.7 million related to our 2014 Restructuring (see Note 3).
(3) 
Includes expenses of $1.5 million related to our 2014 Restructuring (see Note 3).
(4) 
Includes expenses of $0.3 million related to our 2014 Restructuring and $43.5 million related to certain goodwill impairments (see Notes 2, 3 and 6).