CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Income Statement [Abstract]
Net sales	$ 468,704	$ 479,456
Cost of sales	292,686	309,842
Gross profit	176,018	169,614
Selling and administrative expenses	167,085	165,937
Impairment of goodwill and intangible assets	32,661	0
Operating income (loss)	(23,728)	3,677
Interest expense, net	1,811	2,111
Income (loss) before income taxes	(25,539)	1,566
Income taxes	(1,643)	546
Net income (loss)	(23,896)	1,020
Less: Net income (loss) attributable to non-controlling interest	(1)	(2)
Net income (loss) attributable to HNI Corporation	$ (23,895)	$ 1,022
Average number of common shares outstanding – basic (in shares)	42,628	43,534
Net income attributable to HNI Corporation per common share – basic (in dollars per share)	$ (0.56)	$ 0.02
Average number of common shares outstanding – diluted (in shares)	42,628	44,089
Net income attributable to HNI Corporation per common share – diluted (in dollars per share)	$ (0.56)	$ 0.02
Foreign currency translation adjustments	$ (600)	$ 963
Change in unrealized gains (losses) on marketable securities, net of tax	59	90
Change in pension and post-retirement liability, net of tax	0	(1,185)
Change in derivative financial instruments, net of tax	(2,216)	(309)
Other comprehensive income (loss), net of tax	(2,757)	(441)
Comprehensive income (loss)	(26,653)	579
Less: Comprehensive loss attributable to non-controlling interest	(1)	(2)
Comprehensive income (loss) attributable to HNI Corporation	$ (26,652)	$ 581