XML 121 R115.htm IDEA: XBRL DOCUMENT v2.4.0.6
Selected Quarterly Consolidated Financial Data (Schedule Of Selected Quarterly Consolidated Financial Data) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Selected Quarterly Consolidated Financial Data [Abstract]                      
Total revenue $ 505,556 $ 557,396 $ 578,523 $ 508,083 $ 460,648 $ 471,777 $ 469,841 $ 395,126 $ 2,149,558 [1] $ 1,797,392 [1] $ 1,530,122 [1]
Gross profit 125,071 145,196 147,796 140,964 126,928 135,922 132,201 120,408 559,027 515,459 463,260
Net income $ 33,698 $ 71,361 $ 52,259 $ 49,589 $ 49,412 $ 45,719 $ 39,856 $ 42,138 $ 206,907 $ 177,125 $ 162,283
Basic earnings per share Net income $ 2.51 $ 5.22 $ 3.77 $ 3.57 $ 3.48 $ 3.19 $ 2.69 $ 2.79 $ 15.10 $ 12.12 $ 10.67
Diluted earnings per share Net income $ 2.51 $ 5.22 $ 3.77 $ 3.57 $ 3.47 $ 3.18 $ 2.69 $ 2.78 $ 15.09 $ 12.09 $ 10.65
Shares used to compute basic earnings per share 13,405 13,680 13,852 13,890 14,209 14,353 14,796 15,118 13,707 14,619 15,206
Shares used to compute diluted earnings per share 13,405 13,680 13,856 13,906 14,235 14,383 14,828 15,154 13,712 14,650 15,243
[1] Net sales to one customer of our petroleum additives segment exceeded 10% of consolidated revenue in 2011, 2010, and 2009. Sales to Royal Dutch Shell plc and its affiliates (Shell) amounted to $246 million (11% of consolidated revenue) in 2011, $217 million (12% of consolidated revenue) in 2010, and $232 million (15% of consolidated revenue) in 2009. These sales represent a wide-range of products sold to this customer in multiple regions of the world.