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Unaudited Quarterly Data
 12 Months Ended
Dec. 31, 2016
Quarterly Financial Data [Abstract]  
Unaudited Quarterly Data
Note U — Unaudited Quarterly Data
Summarized quarterly financial data for the years ended December 31, 2016, and 2015 is as follows:
(In thousands, except per share data)
1st Quarter
 
2nd Quarter
 
3rd Quarter
 
4th Quarter
Year Ended December 31, 2016
 
 
 
 
 
 
 
Revenues
$
835,652

 
$
749,619

 
$
693,877

 
$
684,104

Gross profit
534,944

 
500,158

 
457,226

 
442,721

Operating profit (loss)
48,430

 
27,550

 
16,700

 
(159,276
)
Net earnings (loss)
25,061

 
9,946

 
6,181

 
(146,383
)
Basic earnings (loss) per common share
$
0.47

 
$
0.19

 
$
0.12

 
$
(2.76
)
Diluted earnings (loss) per common share
$
0.47

 
$
0.19

 
$
0.12

 
$
(2.76
)
Cash dividends declared per common share
$
0.08

 
$
0.08

 
$
0.08

 
$
0.08

(In thousands, except per share data)
1st Quarter
 
2nd Quarter
 
3rd Quarter
 
4th Quarter(1)
Year Ended December 31, 2015
 
 
 
 
 
 
 
Revenues
$
877,639

 
$
815,343

 
$
791,605

 
$
793,833

Gross profit
564,593

 
538,529

 
488,612

 
526,375

Operating profit (loss)
56,598

 
49,701

 
6,565

 
(1,120,752
)
Net earnings (loss)
27,298

 
23,147

 
(4,092
)
 
(999,873
)
Basic earnings (loss) per common share
$
0.51

 
$
0.44

 
$
(0.08
)
 
$
(18.84
)
Diluted earnings (loss) per common share
$
0.51

 
$
0.43

 
$
(0.08
)
 
$
(18.84
)
Cash dividends declared per common share
$
0.24

 
$
0.24

 
$
0.24

 
$
0.24

(1) Fourth quarter net loss and loss per share revised for correction of deferred tax error associated with our goodwill impairment reported in the fourth quarter of 2015 as discussed in Note B.