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401(k) Profit Sharing, Deferred Compensation and Long-term Incentive Plans | 12 Months Ended
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Dec. 31, 2017
Postemployment Benefits [Abstract] |
401(k) Profit Sharing, Deferred Compensation and Long-Term Incentive Plans | 401(k) Profit Sharing, Deferred Compensation and Long-Term Incentive Plans We have a defined contribution 401(k) plan and trust covering substantially all full-time employees. The annual contribution to the plan is at the discretion of our Board of Directors. Contributions of $5.8 million, $5.4 million, and $5.3 million were recognized for the years ended December 31, 2017, 2016 and 2015, respectively. Employees may contribute to the plan if they meet certain eligibility requirements. We offer a deferred compensation and long-term incentive plan (the “LTIP”) to provide certain employees the ability to accumulate assets for retirement on a tax deferred basis. We may, depending on position, also make discretionary contributions to the LTIP. These discretionary contributions vest between one and seven years based on the employee’s age. Additionally, a participant may defer a portion of his or her compensation and receive the deferred amount upon certain events, including termination or retirement. The following is a summary related to our LTIP (in thousands):
Year Ended December 31, |  | 2017 |  | 2016 |  | 2015
Compensation expense |  | $ | 1,059 |  |  | $ | 1,081 |  |  | $ | 1,812 |
Total discretionary contribution |  | $ | 1,730 |  |  | $ | 1,785 |  |  | $ | 2,249 |
Guaranteed annual return |  | 5.00 | % |  | 5.25 | % |  | 5.25 | %
As of December 31, 2017 and 2016, the balance due to participants was $27.9 million and $23.5 million, respectively, and was included as a component of other long-term liabilities in the Consolidated Balance Sheets.

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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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