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Description of Business and Summary of Significant Accounting Policies (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
Showroom
State
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
Showroom
State
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Description of Business and Summary of Significant Accounting Policies [Abstract]                        
Number of showrooms | Showroom 120               120      
Number of states | State 16               16      
Cash and Cash Equivalents [Abstract]                        
Period of settlement for amounts due from third-party financial institutions for credit and debit card transactions                 5 days      
Other Income, net [Abstract]                        
Insurance recovery receivable                       $ 0
Gains on insurance recovery                 $ 307 $ 2,848 $ 3,338  
Gain on sale of former retail location                 425 525 700  
Revenue Recognition [Abstract]                        
Net sales $ 208,968 $ 210,547 $ 198,775 $ 199,442 $ 214,962 $ 207,647 $ 196,829 $ 200,427 817,733 819,866 821,571  
Deliveries expense                 40,236 39,582 39,222  
Selling, General and Administrative Expenses [Abstract]                        
Purchasing, warehousing, delivery and other distribution costs                 80,383 77,368 77,266  
Deferred Escalating Minimum Rent and Lease Incentives [Abstract]                        
Liability for deferred escalating minimum rent 7,608       8,565       7,608 8,565    
Liability for lease incentives 1,209       1,139       1,209 1,139    
Advertising Expense [Abstract]                        
Prepaid advertising cost 746       602       746 602    
Advertising expense                 48,315 47,921 45,132  
Interest Expense, net [Abstract]                        
Interest expense                 2,451 2,512 2,568  
Self-Insurance [Abstract]                        
Self-insurance reserves 8,933       8,975       8,933 8,975    
Fair Values of Financial Instruments [Abstract]                        
Deferred compensation plans $ 5,995       $ 5,986       $ 5,995 $ 5,986    
Earnings Per Share [Abstract]                        
Percentage of earnings or losses assumed in calculation 100.00%       100.00%       100.00% 100.00%    
Accumulated Other Comprehensive Income (Loss) [Abstract]                        
Accumulated other comprehensive (loss) $ (1,465)       $ (2,144)       $ (1,465) $ (2,144)    
Other Expenses [Member]                        
Other Income, net [Abstract]                        
Gains on insurance recovery                     1,110  
Hurricane Irma [Member]                        
Other Income, net [Abstract]                        
Gains on insurance recovery                   1,500    
Buildings [Member]                        
Other Income, net [Abstract]                        
Gains on insurance recovery                   1,351 2,228  
Buildings [Member] | Minimum [Member]                        
Property, Plant and Equipment [Abstract]                        
Estimated useful life of property and equipment                 25 years      
Buildings [Member] | Maximum [Member]                        
Property, Plant and Equipment [Abstract]                        
Estimated useful life of property and equipment                 33 years      
Improvements [Member] | Minimum [Member]                        
Property, Plant and Equipment [Abstract]                        
Estimated useful life of property and equipment                 5 years      
Improvements [Member] | Maximum [Member]                        
Property, Plant and Equipment [Abstract]                        
Estimated useful life of property and equipment                 15 years      
Furniture and Fixtures [Member] | Minimum [Member]                        
Property, Plant and Equipment [Abstract]                        
Estimated useful life of property and equipment                 3 years      
Furniture and Fixtures [Member] | Maximum [Member]                        
Property, Plant and Equipment [Abstract]                        
Estimated useful life of property and equipment                 15 years      
Equipment [Member] | Minimum [Member]                        
Property, Plant and Equipment [Abstract]                        
Estimated useful life of property and equipment                 3 years      
Equipment [Member] | Maximum [Member]                        
Property, Plant and Equipment [Abstract]                        
Estimated useful life of property and equipment                 15 years      
Buildings under Lease [Member]                        
Property, Plant and Equipment [Abstract]                        
Estimated useful life of property and equipment                 15 years      
Delivery Fee [Member]                        
Revenue Recognition [Abstract]                        
Net sales                 $ 34,405 $ 25,728 $ 25,467