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Summary of Significant Accounting Policies (Other Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]      
Allowance for doubtful accounts and cash discounts $ 993 $ 766  
Tax on payments of dividend equivalent rights 8,967 8,696 $ 7,655
Segment Reporting Information [Line Items]      
Shipping and handling fees and costs 1,301,579 1,292,484 1,228,046
Tobacco and E-Cigarettes      
Segment Reporting Information [Line Items]      
Advertising costs 3,751 3,672 3,712
Real Estate      
Segment Reporting Information [Line Items]      
Shipping and handling fees and costs 530,449 505,233 477,278
Advertising costs 22,917 23,424 19,412
Shipping and Handling      
Segment Reporting Information [Line Items]      
Shipping and handling fees and costs $ 5,802 $ 5,658 $ 5,012