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Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Segment Reporting Information [Line Items]        
Net sales $ 60,888 $ 57,453 $ 130,414 $ 126,573
Earnings (loss) from operations 1,947 1,890 5,514 5,349
Product sales [Member]        
Segment Reporting Information [Line Items]        
Net sales 60,416 56,862 129,148 125,281
Licensing revenues [Member]        
Segment Reporting Information [Line Items]        
Net sales 472 591 1,266 1,292
Wholesale [Member]        
Segment Reporting Information [Line Items]        
Net sales 45,639 42,291 99,427 95,141
Earnings (loss) from operations 1,748 1,298 5,139 4,464
Wholesale [Member] | Product sales [Member]        
Segment Reporting Information [Line Items]        
Net sales 45,167 41,700 98,161 93,849
Wholesale [Member] | Licensing revenues [Member]        
Segment Reporting Information [Line Items]        
Net sales 472 591 1,266 1,292
Retail [Member]        
Segment Reporting Information [Line Items]        
Net sales 4,624 4,758 9,551 9,688
Earnings (loss) from operations 222 184 428 227
Retail [Member] | Product sales [Member]        
Segment Reporting Information [Line Items]        
Net sales 4,624 4,758 9,551 9,688
Retail [Member] | Licensing revenues [Member]        
Segment Reporting Information [Line Items]        
Net sales 0 0 0 0
Other [Member]        
Segment Reporting Information [Line Items]        
Net sales 10,625 10,404 21,436 21,744
Earnings (loss) from operations (23) 408 (53) 658
Other [Member] | Product sales [Member]        
Segment Reporting Information [Line Items]        
Net sales 10,625 10,404 21,436 21,744
Other [Member] | Licensing revenues [Member]        
Segment Reporting Information [Line Items]        
Net sales $ 0 $ 0 $ 0 $ 0