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Accrued Expenses (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Accrued Expenses [Abstract]    
Payroll and related taxes $ 16,808 $ 11,805
Bonuses and commissions 16,233 14,387
Profit sharing contribution 7,717 5,005
Insurance 30,548 28,067
Promotions 10,866 8,591
Sales, real estate, and personal property taxes 26,676 19,360
Vehicle loss reserve and deferred rebates 743 1,431
Legal reserves 100 6,270
Other 2,271 1,496
Accrued expenses $ 111,962 $ 96,412