| **Quarterly Financial Data (Tables)**   | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
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| **Quarterly Financial Data [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| Schedule Of Quarterly Financial Data    | Summarized quarterly financial data for fiscal 2012 and 2011 consisted of (in thousands, except per share amounts): 2012 FirstQuarter SecondQuarter ThirdQuarter FourthQuarter TotalNet sales $529,654 $573,470 $608,819 $594,789 $2,306,732Gross profit 51,652 54,624 57,393 56,244 219,913Net income 17,870 19,958 23,533 728*62,089           Earnings per share (1):          Basic $0.52 $0.57 $0.67 $0.02 $1.78Diluted $0.51 $0.56 $0.66 $0.02 $1.75           2011 FirstQuarter SecondQuarter ThirdQuarter FourthQuarter TotalNet sales $565,774 $568,145 $559,183 $538,130 $2,231,232Gross profit 54,910 55,470 54,074 50,288 214,742Net income 25,033 23,860 22,040 18,323 89,256           Earnings per share (1):          Basic $0.62 $0.60 $0.60 $0.53 $2.34Diluted $0.61 $0.59 $0.58 $0.52 $2.30 |

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| - Definition
Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 270 -SubTopic 10 -Publisher FASB -Number  -Article  -Subparagraph (a)-(j) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6952194&loc=d3e1280-108306
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