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Business Overview And Summary Of Significant Accounting Policies (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2012
Business Overview And Summary Of Significant Accounting Policies [Abstract] |
Approximate number of company owned or leased store locations | 2,700
Number of financial institutions where cash and cash equivalents are primarily held | 2
Initial lease term of certain distribution centers and manufacturing and store locations, minimum (in months) | 1 month
Initial lease term of certain distribution centers and manufacturing and store locations, maximum (in months) | 60 months
Initial lease terms of most store locations, minimum (in months) | 36 months
Initial lease terms of most store locations, maximum (in months) | 48 months
Leasehold improvements on operating leases amortization period (in months) | 36 months
Terms of semi-tractor leases (in months) | 36 months
Term of non-cancellable pick-up leases (in years) | 1 year
Renewal options for non-cancellable pick-up leases, maximum (in months) | 72 months
Options vesting and exercisable period, maximum (in years) | 8 years
Options termination period after the end of the relevant vesting period (in months) | 13 months

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