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Accumulated Other Comprehensive Income (Loss) and Shareholders' Equity (Reclassification) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 01, 2016
Oct. 03, 2015
Oct. 01, 2016
Oct. 03, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Selling and administrative expenses $ (169,495) $ (170,371) $ (496,920) $ (506,354)
Tax (expense) or benefit (16,837) (18,619) (38,652) (37,367)
Net income attributable to HNI Corporation 33,813 40,848 74,685 73,205
Reclassifications from accumulated other comprehensive income (loss) | Derivative Financial Instruments        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Net income attributable to HNI Corporation (191) (425) (453) (1,302)
Interest rate swap | Reclassifications from accumulated other comprehensive income (loss) | Derivative Financial Instruments        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Selling and administrative expenses (302) 0 (717) 0
Tax (expense) or benefit 111 0 264 0
Net income attributable to HNI Corporation (191) 0 (453) 0
Diesel hedge | Reclassifications from accumulated other comprehensive income (loss) | Derivative Financial Instruments        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Selling and administrative expenses 0 (680) 0 (1,987)
Tax (expense) or benefit 0 255 0 685
Net income attributable to HNI Corporation $ 0 $ (425) $ 0 $ (1,302)