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401(k) Profit Sharing, Deferred Compensation and Long-term Incentive Plans | 12 Months Ended
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Dec. 31, 2019
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 $9.8 million, $5.7 million, and $5.8 million were recognized for the years ended December 31, 2019, 2018 and 2017, respectively. Employees may contribute to the plan if they meet certain eligibility requirements. We offer a non-qualified deferred compensation and supplemental executive retirement plan (the “SERP”) 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 SERP. These discretionary contributions could vest immediately or up to 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 SERP (in millions):
Year Ended December 31, |  | 2019 |  | 2018 |  | 2017
Compensation expense |  | $ | 0.9 |  |  | $ | 1.3 |  |  | $ | 1.1 |
Total discretionary contribution |  | $ | 0.3 |  |  | $ | 0.8 |  |  | $ | 1.7 |
Guaranteed annual return |  | 5.00 | % |  | 5.00 | % |  | 5.00 | %
As of December 31, 2019 and 2018, the balance due to participants was $37.9 million and $32.9 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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