Earnings Per Share - Schedule of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 02, 2022	Apr. 03, 2021
Numerator:
Numerator for both basic and diluted EPS attributable to HNI Corporation net income	$ 14,178	$ 15,019
Denominators:
Denominator for basic EPS weighted-average common shares outstanding (in shares)	42,388	43,163
Potentially dilutive shares from stock-based compensation plans (in shares)	684	421
Denominator for diluted EPS (in shares)	43,072	43,584
Earnings per share - basic (in dollars per share)	$ 0.33	$ 0.35
Earnings per share - diluted (in dollars per share)	$ 0.33	$ 0.34