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Acquisitions, Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 31, 2016 | May 31, 2016 | Feb. 29, 2016 | Jan. 31, 2016 | Aug. 31, 2015 | Apr. 30, 2015 | Jan. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2015 | Jun. 30, 2015
Atwood |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Annual sales of acquired entity |  |  |  |  |  |  |  |  | $ 30,000 |
Signature Seating |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Annual sales of acquired entity |  |  |  |  |  |  |  |  |  | $ 16,000
Cash consideration |  |  |  |  | $ 16,000 |  |  |  |  |
Total purchase price |  |  |  |  | $ 19,556 |  |  |  |  |
Signature Seating | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful life in years |  |  |  |  | 15 years |  |  |  |  |
Project 2000 |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of interests acquired |  | 100.00% |  |  |  |  |  |  |  |
Annual sales of acquired entity |  |  |  |  |  |  |  |  | $ 12,000 |
Cash consideration |  | $ 18,800 |  |  |  |  |  |  |  |
Total purchase price |  | $ 17,459 |  |  |  |  |  |  |  |
Spectal Industries |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Annual sales of acquired entity |  |  |  |  |  | $ 25,000 |  |  |  |
Cash consideration |  |  |  |  |  | 22,335 |  |  |  |
Total purchase price |  |  |  |  |  | $ 23,546 |  |  |  |
Spectal Industries | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired intangible assets useful life |  |  |  |  |  | 15 years |  |  |  |
EA Technologies |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Annual sales of acquired entity |  |  |  |  |  |  | $ 17,000 |  |  |
Cash consideration |  |  |  |  |  |  | $ 9,248 | $ 6,600 |  |
Flair Interiors |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Annual sales of acquired entity |  |  | $ 25,000 |  |  |  |  |  |  |
Cash consideration |  |  | $ 8,100 |  |  |  |  |  |  |
Flair Interiors | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired intangible assets useful life |  | 15 years | 15 years |  |  |  |  |  |  |
Highwater Marine Furniture |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Annual sales of acquired entity |  |  |  | $ 20,000 |  |  |  |  |  |
Cash consideration |  |  |  | $ 10,000 |  |  |  |  |  |
Highwater Marine Furniture | Customer Relationships |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired intangible assets useful life |  |  |  | 15 years |  |  |  |  |  |
Subsequent Event | Atwood |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Total purchase price | $ 12,500 |  |  |  |  |  |  |  |  |

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