Stock-Based Compensation	9 Months Ended
Stock-Based Compensation	Oct. 01, 2016
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 and nine months ended October 1, 2016, the Corporation recognized $1.0 million and $7.4 million, respectively, of stock based compensation expense. For the three months and nine months ended October 3, 2015, the Corporation recognized $1.7 million and $8.0 million, respectively, 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 $7.7 million and $6.5 million and time-based restricted stock units with adjusted fair values of $0.7 million and $1.1 million in the nine months ended October 1, 2016 and October 3, 2015, respectively. At October 1, 2016, there was $3.9 million of unrecognized compensation cost related to non-vested stock options, which the Corporation expects to recognize over a weighted-average remaining service period of 1.3 years, and $1.1 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.

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.