v2.4.0.8
Pro Forma Effect of Businesses Acquired (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Business Acquisition                            
Revenue, as reported $ 1,298,094 $ 1,067,915 [1] $ 1,016,707 [1] $ 1,006,531 [1] $ 1,031,777 [1] $ 939,632 $ 783,898 $ 759,684 $ 786,648 $ 3,745,839 $ 3,055,015 $ 4,122,930 $ 3,269,862 $ 2,469,881
Pro forma revenue 1,311,438   1,200,009             3,985,159 3,680,851 4,325,074 4,142,906 3,394,694
Net Income (Loss) Attributable to Parent 73,445 62,188 [1] 54,048 [1] 63,998 [1] 80,991 [1] 56,145 49,231 46,706 58,182 233,759 199,037 261,225 210,264 169,071
Income from continuing operations, as reported                       261,225 210,264 167,118
Pro forma income from continuing operations                       273,899 259,518 189,783
Basic earnings per share from continuing operations                       $ 0.88 [2] $ 0.72 [2] $ 0.58 [2]
Pro forma basic earnings per share from continuing operations (a)                       $ 0.93 [2] $ 0.89 [2] $ 0.66 [2]
Diluted earnings per share from continuing operations                       $ 0.87 [2] $ 0.71 [2] $ 0.57 [2]
Pro forma diluted earnings per share from continuing operations (a)                       $ 0.91 [2] $ 0.87 [2] $ 0.65 [2]
Business Acquisition, Pro Forma Net Income (Loss) 75,236   59,909             246,916 222,601      
Earnings Per Share, Basic $ 0.24 $ 0.21 [1] $ 0.18 [1] $ 0.22 [1] $ 0.28 [1] $ 0.19 [1] $ 0.17 [1] $ 0.16 [1] $ 0.20 [1] $ 0.78 $ 0.67 $ 0.88 [2] $ 0.72 [2] $ 0.59 [2]
Business Acquisition, Pro Forma Earnings Per Share, Basic $ 0.25 [2]   $ 0.20 [2]             $ 0.83 [2] $ 0.75 [2]      
Earnings Per Share, Diluted $ 0.24 $ 0.21 [1] $ 0.18 [1] $ 0.21 [1] $ 0.27 [1] $ 0.19 [1] $ 0.17 [1] $ 0.16 [1] $ 0.20 [1] $ 0.77 $ 0.66 $ 0.87 [2] $ 0.71 [2] $ 0.58 [2]
Business Acquisition, Pro Forma Earnings Per Share, Diluted $ 0.25 [2]   $ 0.20 [2]             $ 0.81 [2] $ 0.74 [2]      
Sator
                            
Business Acquisition                            
Revenue of purchased businesses for the period prior to acquisition 0   89,991             126,309 276,656      
Net income of purchased businesses for the period prior to acquisition, including pro forma purchase accounting adjustments 0   1,465             5,345 4,742      
Effect of purchased businesses for the period prior to acquisition $ 0.00   $ 0.00             $ 0.02 $ 0.02      
Effect of purchased businesses for the period prior to acquisition $ 0.00   $ 0.00             $ 0.02 $ 0.02      
All 2012 and 2013 Acquisitions Excluding Sator
                            
Business Acquisition                            
Revenue of purchased businesses for the period prior to acquisition 13,344   93,311             113,011 349,180      
Net income of purchased businesses for the period prior to acquisition, including pro forma purchase accounting adjustments 1,791   4,396             7,812 18,822      
Effect of purchased businesses for the period prior to acquisition $ 0.01   $ 0.01             $ 0.03 $ 0.06      
Effect of purchased businesses for the period prior to acquisition $ 0.01   $ 0.01             $ 0.03 $ 0.06      
Euro Car Parts Holdings Limited
                            
Business Acquisition                            
Revenue of purchased businesses for the period prior to acquisition                         407,042 420,769
Net income of purchased businesses for the period prior to acquisition, including pro forma purchase accounting adjustments                         21,858 9,669
Effect of purchased businesses for the period prior to acquisition                         $ 0.07 $ 0.03
Effect of purchased businesses for the period prior to acquisition                         $ 0.07 $ 0.03
All 2012 & 2011 Acquisitions Excluding ECP
                            
Business Acquisition                            
Revenue of purchased businesses for the period prior to acquisition                       202,144 466,002  
Net income of purchased businesses for the period prior to acquisition, including pro forma purchase accounting adjustments                       12,674 27,396  
Effect of purchased businesses for the period prior to acquisition                       $ 0.04 $ 0.09  
Effect of purchased businesses for the period prior to acquisition                       $ 0.04 $ 0.09  
All 2011 & 2010 Acquisitions Excluding ECP
                            
Business Acquisition                            
Revenue of purchased businesses for the period prior to acquisition                           504,044
Net income of purchased businesses for the period prior to acquisition, including pro forma purchase accounting adjustments                           $ 12,996
Effect of purchased businesses for the period prior to acquisition                           $ 0.05
Effect of purchased businesses for the period prior to acquisition                           $ 0.04
[1] Gross margin and operating income during the quarters ended March 31, 2012, June 30, 2012, September 30, 2012 and December 31, 2012 include gains of $8.3 million, $8.4 million, $0.5 million and $0.7 million, respectively, resulting from lawsuit settlements with certain of our aftermarket product suppliers as discussed in Note 8, "Commitments and Contingencies."
[2] The sum of the individual earnings per share amounts may not equal the total due to rounding.