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Segment Information (Tables)
 3 Months Ended
Mar. 31, 2015
Segment Reporting [Abstract]  
Consolidated Revenue by Segment
Consolidated Revenue by Segment
 
 
Three Months Ended
March 31,
(in thousands)
 
2015
 
2014
Petroleum additives
 
 
 
 
     Lubricant additives
 
$
453,722

 
$
473,349

     Fuel additives
 
101,043

 
100,696

          Total
 
554,765

 
574,045

All other
 
4,801

 
2,377

Consolidated revenue
 
$
559,566

 
$
576,422
Segment Operating Profit
Segment Operating Profit
 
 
Three Months Ended
March 31,
(in thousands)
 
2015
 
2014
Petroleum additives
 
$
105,025

 
$
96,179

All other
 
2,099

 
535

Segment operating profit
 
107,124

 
96,714

Corporate, general, and administrative expenses
 
(7,015
)
 
(6,553
)
Interest and financing expenses, net
 
(3,816
)
 
(4,164
)
Loss on interest rate swap agreement (a)
 
(2,408
)
 
(2,233
)
Other (expense) income, net
 
(248
)
 
31

Income before income tax expense
 
$
93,637

 
$
83,795

 
(a)
The loss on interest rate swap agreement represents the change, since the beginning of the reporting period, in the fair value of an interest rate swap which we entered into on June 25, 2009. We are not using hedge accounting to record the interest rate swap, and accordingly, any change in the fair value is immediately recognized in earnings.