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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($) Showroom State | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract] |  |  |
Number of showrooms | Showroom | 124 |  |
Number of states | State | 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 | $ 2,848 | $ 3,338 | 0
Gain on sale of former retail location | 525 | 700 |
Settlement related to credit card litigation | 800 |  |
Revenue Recognition [Abstract] |  |  |
Delivery fees | 25,728 | 25,467 | 27,650
Deliveries expense | 39,582 | 39,222 | 37,730
Selling, General and Administrative Expenses [Abstract] |  |  |
Purchasing, warehousing, delivery and other distribution costs | 77,368 | 77,266 | 73,803
Deferred Escalating Minimum Rent and Lease Incentives [Abstract] |  |  |
Liability for deferred escalating minimum rent | 8,565 | 8,797 |
Lease incentives | 1,139 | 676 |
Advertising Expense [Abstract] |  |  |
Prepaid advertising cost | 602 | 324 |
Advertising expense | 47,921 | 45,132 | 45,784
Interest Expense, net [Abstract] |  |  |
Interest expense | 2,512 | 2,568 | 2,615
Self-Insurance [Abstract] |  |  |
Self-insurance reserves | 8,975 | 9,095 |
Fair Values of Financial Instruments [Abstract] |  |  |
Deferred compensation plans | $ 5,986 | $ 4,410 |
Earnings Per Share [Abstract] |  |  |
Percentage of earnings or losses assumed in calculation | 100.00% | 100.00% |
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |
Accumulated other comprehensive (loss) | $ (2,144) | $ (1,830) |
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 [Line Items] |  |  |
Estimated useful life of property and equipment | 25 years |  |
Buildings [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful life of property and equipment | 33 years |  |
Improvements [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful life of property and equipment | 5 years |  |
Improvements [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful life of property and equipment | 15 years |  |
Furniture and Fixtures [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful life of property and equipment | 3 years |  |
Furniture and Fixtures [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful life of property and equipment | 15 years |  |
Equipment [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful life of property and equipment | 3 years |  |
Equipment [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful life of property and equipment | 15 years |  |
Buildings under Lease [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful life of property and equipment | 15 years |  |
ASU 2016-09 [Member] |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Excess tax (cost) benefit related to stock-based plans |  | $ (121) | $ 253
ASU 2014-09 [Member] |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Cumulative effect on adoption method in increasing retained earnings | $ 130 |  |

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