EARNINGS PER SHARE - Earning per share basic and diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Numerator:
Net earnings attributable to Weyco Group, Inc.	$ 20,882	$ 20,484
Denominator:
Basic weighted average shares outstanding (in shares)	9,904	10,168
Effect of dilutive securities:
Employee stock-based awards (in shares)	49	223
Diluted weighted average shares outstanding (in shares)	9,953	10,391
Basic earnings per share (in dollars per share)	$ 2.11	$ 2.01
Diluted earnings per share (in dollars per share)	$ 2.10	$ 1.97