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EMPLOYEE BENEFIT PLANS | 12 Months Ended
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Dec. 31, 2017
Retirement Benefits [Abstract] |
EMPLOYEE BENEFIT PLANS | EMPLOYEE BENEFIT PLANS Defined Contribution Plan We offer our eligible employees the opportunity to contribute to a 401(k) plan (“401(k) Plan”). Under the provisions of the 401(k) Plan participants may direct us to defer a portion of their compensation to the 401(k) Plan, subject to Internal Revenue Code limitations. We provide an employer matching contribution equal to fifty cents for every dollar an employee invests in the 401(k) Plan up to our maximum match of one thousand dollars per employee per calendar year, subject to revision. Participants vest in employer contributions ratable over a three year period. Employer contributions for fiscal years 2017, 2016 and 2015 amounted to $1,187, $1,119 and $1,033, respectively. Employee Stock Purchase Plan We offer our eligible employees the opportunity to participate in an employee stock purchase plan. Under this plan, qualified employees may purchase shares of Class A common stock by payroll deduction at a 15% discount from the market price. During fiscal years 2017, 2016 and 2015, 41, 70 and 80 shares, respectively, of Class A common stock were issued under this plan. As of December 31, 2017, 143 shares of Class A common stock were available for distribution under this plan. Multiemployer Pension Plan We make contributions to a multiemployer defined benefit pension plan, the New England Teamsters and Trucking Industry Pension Fund, under the terms of a collective bargaining agreement that covers our union represented employees. The Pension Plan provides retirement benefits to participants based on their service to contributing employers. We do not administer this plan. The risks of participating in a multiemployer plan are different from a single-employer plan in that: (i) assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees or former employees of other participating employers; (ii) if a participating employer stops contributing to the plan, the unfunded obligations of the plan may be required to be assumed by the remaining participating employers; and (iii) if we choose to stop participating in our multiemployer plan, we may be required to pay the plan a withdrawal amount based on the underfunded status of the plan. The following table outlines our participation in the multiemployer defined benefit pension plan:
Pension Fund |  | EIN/Pension Plan Number |  | Pension Protection Act Zone Status |  | Funding Improvement or Rehabilitation Plan Status |  | Contributions to Plan |  | Expiration Date of CBA
|  |  |  | Fiscal Year Ended December 31, |
|  | 2017 |  | 2016 |  |  | 2017 |  | 2016 |  | 2015 |
New England Teamsters and Trucking Industry Pension Fund |  | 04-6372430 |  | Critical and declining |  | Critical |  | Implemented |  | $ | 627 |  |  | $ | 523 |  |  | $ | 413 |  |  | June 30, 2020
The status is based on the latest plan information for the plan year ended September 30, 2017 that we received from the pension plan and is certified by the pension plans’ actuary. Plans with a “critical and declining” status are funded at less than 65% and have a projected funding deficiency in the current or next four plan years and has a projected insolvency date which is less than the 20-year minimum statutory requirement. Our contributions to the multiemployer pension plan represent less than 5% of total contributions to such plan for the plan year ended September 30, 2016 and a rehabilitation plan has been implemented with no surcharge imposed. Under current law regarding multiemployer benefit plans, a plan’s termination, our voluntary withdrawal, or the withdrawal of all contributing employers from any under-funded multiemployer pension plan would require us to make payments to the plan for our proportionate share of the multiemployer plan’s unfunded vested liabilities. We could have adjustments to estimates for these matters in the near term that could have a material effect on its consolidated financial position, results of operations or cash flows. At the date these financial statements were issued, a Form 5500 was not available for the plan year ended September 30, 2017.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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