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QUARTERLY FINANCIAL DATA (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information [Line Items]
Net sales	$ 80,270	$ 76,906	$ 57,453	$ 69,120	$ 82,097	$ 79,069	$ 56,867	$ 78,900	$ 283,749	$ 296,933	$ 320,617
Gross earnings	33,907	29,468	22,090	25,228	33,303	29,322	22,291	27,127	110,693	112,043	121,609
Net earnings attributable to Weyco Group, Inc.	$ 8,083	$ 4,934	$ 1,257	$ 2,217	$ 8,185	$ 4,600	$ 1,000	$ 2,687	$ 16,491	$ 16,472	$ 18,212
Net earnings per share:
Basic	$ 0.79	$ 0.49	$ 0.12	$ 0.21	$ 0.79	$ 0.44	$ 0.09	$ 0.25	$ 1.61	$ 1.57	$ 1.69
Diluted	$ 0.79	$ 0.48	$ 0.12	$ 0.21	$ 0.78	$ 0.44	$ 0.09	$ 0.25	$ 1.6	$ 1.56	$ 1.68

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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