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Stock-Based Compensation | 9 Months Ended
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Sep. 30, 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. 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 and the HNI Corporation Members' Stock Purchase Plan adopted in 2017. The following table summarizes stock-based compensation expense (in thousands):
| Three Months Ended |  | Nine Months Ended
| September 30, 2017 |  | October 1, 2016 |  | September 30, 2017 |  | October 1, 2016
Stock-based compensation expense | $ | 956 |  |  | $ | 959 |  |  | $ | 6,759 |  |  | $ | 7,400 |
The options and units granted by the Corporation had fair values as follows (in thousands):
| Nine Months Ended
| September 30, 2017 |  | October 1, 2016
Stock options | $ | 7,206 |  |  | $ | 7,720 |
Time-based restricted stock units | $ | — |  |  | $ | 712 |
The following table summarizes unrecognized compensation expense and the weighted-average remaining service period for non-vested stock options and restricted stock units as of September 30, 2017:
| Unrecognized Compensation Expense (in thousands) |  | Weighted-Average Remaining Service Period (years)
Non-vested stock options | $ | 4,103 |  |  | 1.2
Non-vested restricted stock units | $ | 474 |  |  | 0.8

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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