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Segment Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Segment Reporting Information [Line Items]    
Product sales $ 68,733 $ 68,419
Licensing revenues 793 701
Net sales 69,526 69,120
Earnings (loss) from operations 3,567 3,459
Wholesale [Member]    
Segment Reporting Information [Line Items]    
Product sales 52,995 52,149
Licensing revenues 793 701
Net sales 53,788 52,850
Earnings (loss) from operations 3,390 3,166
Retail [Member]    
Segment Reporting Information [Line Items]    
Product sales 4,927 4,930
Licensing revenues 0 0
Net sales 4,927 4,930
Earnings (loss) from operations 206 43
Other [Member]    
Segment Reporting Information [Line Items]    
Product sales 10,811 11,340
Licensing revenues 0 0
Net sales 10,811 11,340
Earnings (loss) from operations $ (29) $ 250