XML 30 R20.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Stock-Based Compensation | 6 Months Ended
--- | ---
Jun. 30, 2018
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 approved stock-based compensation plans and shares issued under the approved member stock purchase plans. The following table summarizes expense associated with these plans (in thousands):
| Three Months Ended |  | Six Months Ended
| June 30, 2018 |  | July 1, 2017 |  | June 30, 2018 |  | July 1, 2017
Compensation cost | $ | 1,196 |  |  | $ | 1,132 |  |  | $ | 4,908 |  |  | $ | 5,803 |
The options and units granted by the Corporation had fair values as follows (in thousands):
| Six Months Ended
| June 30, 2018 |  | July 1, 2017
Stock options | $ | 7,200 |  |  | $ | 7,206 |
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 June 30, 2018:
| Unrecognized Compensation Expense (in thousands) |  | Weighted-Average Remaining Service Period (years)
Non-vested stock options | $ | 5,238 |  |  | 1.2
Non-vested restricted stock units | $ | 178 |  |  | 0.5

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration