Stock-Based Compensation	3 Months Ended
Stock-Based Compensation	Apr. 01, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Corporation measures stock-based compensation expense at grant date, based on the fair value of the award, and recognizes expense over the employees' requisite service periods. For the three months ended April 1, 2017, the Corporation recognized $4.7 million of stock based compensation expense. For the three months ended April 2, 2016, the Corporation recognized $5.3 million of stock based compensation expense. Stock-based compensation expense is the cost of stock options and time-based restricted stock units issued under the HNI Corporation 2007 Stock-Based Compensation Plan and shares issued under the HNI Corporation 2002 Members' Stock Purchase Plan. The Corporation granted stock options with fair values of $7.2 million and $7.6 million in the three months ended April 1, 2017 and April 2, 2016, respectively. The Corporation granted time-based restricted stock units with adjusted fair values of $0.5 million in the three months ended April 2, 2016. As of April 1, 2017, there was $5.5 million of unrecognized compensation cost, net of forfeiture assumptions, related to non-vested stock options, which the Corporation expects to recognize over a weighted-average remaining service period of 1.4 years, and $0.8 million of unrecognized compensation costs related to non-vested restricted stock units, which the Corporation expects to recognize over a weighted-average remaining service period of 1.0 years. As of April 1, 2017, there was a $5.4 million receivable reflected in "Receivables" in the Condensed Consolidated Balance Sheets relating to stock options exercised but not yet settled. The total amount was paid on or prior to April 5, 2017.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.