v2.4.0.8
Schedule of Revenue by Product Category (Details) (USD $)
In Thousands, 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
Revenue from External Customers                            
Revenue $ 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
Aftermarket, other new and refurbished products
                            
Revenue from External Customers                            
Revenue 793,925   562,750             2,199,009 1,676,006 2,286,853 1,634,003 1,236,806
Recycled, remanufactured and related products and services
                            
Revenue from External Customers                            
Revenue 349,411   317,877             1,060,681 967,250 1,277,023 1,115,088 888,320
Other
                            
Revenue from External Customers                            
Revenue $ 154,758   $ 136,080             $ 486,149 $ 411,759 $ 559,054 $ 520,771 $ 344,755
[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."