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Employee Benefit Plans | 12 Months Ended
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Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract] |
Employee Benefit Plans | Employee Benefit Plans We sponsor an employee savings plan (“401(k) plan”) covering substantially all of our United States based employees. We also sponsor a defined benefit pension plan (the “pension plan”) that was frozen in 2009. It covered substantially all our United States based employees at the time it was frozen. Total employer contributions to the 401(k) plan were $7.6 million, $6.9 million and $7.3 million during the years ended December 31, 2015, 2014 and 2013, respectively. We use a December 31, measurement date for our pension plan. Gains and losses are amortized on a straight-line basis over the average remaining service period of active participants. The following table provides a reconciliation of the projected benefit obligation, plan assets and funded status of the pension plan at December 31:
| 2015 |  | 2014
Accumulated Benefit Obligation | $ | 78,437 |  |  | $ | 91,107 |
Change in benefit obligation |  |  |  |  |
Projected benefit obligation at beginning of year | $ | 91,107 |  |  | $ | 75,946 |
Service cost | 240 |  |  | 271 |
Interest cost | 3,394 |  |  | 3,465 |
Actuarial (gain) loss | (11,806 | ) |  | 16,546 |
Benefits paid | (1,620 | ) |  | (1,414 | )
Settlement | (2,878 | ) |  | (3,707 | )
Projected benefit obligation at end of year | $ | 78,437 |  |  | $ | 91,107 |
Change in plan assets |  |  |  |  |
Fair value of plan assets at beginning of year | $ | 73,431 |  |  | $ | 76,442 |
Actual gain on plan assets | (1,765 | ) |  | 2,110 |
Benefits paid | (1,620 | ) |  | (1,414 | )
Settlement | (2,878 | ) |  | (3,707 | )
Fair value of plan assets at end of year | $ | 67,168 |  |  | $ | 73,431 |
Funded status | $ | (11,269 | ) |  | $ | (17,676 | )
Amounts recognized in the consolidated balance sheets consist of the following at December 31,:
| 2015 |  | 2014
Other long-term liabilities | $ | (11,269 | ) |  | $ | (17,676 | )
Accumulated other comprehensive loss | (41,205 | ) |  | (48,782 | )
The following actuarial assumptions were used to determine our accumulated and projected benefit obligations as of December 31,:
| 2015 |  | 2014
Discount rate | 4.54 | % |  | 3.81 | %
Expected return on plan assets | 8.00 | % |  | 8.00 | %
Accumulated other comprehensive loss for the years ended December 31, 2015 and 2014 consists of net actuarial losses of $41,205 and $48,782, respectively, not yet recognized in net periodic pension cost (before income taxes). Other changes in plan assets and benefit obligations recognized in other comprehensive income in 2015 are as follows:
Current year actuarial gain | $ | 4,344 |
Amortization of actuarial loss | 3,233 |
Total recognized in other comprehensive loss | $ | 7,577 |
The estimated portion of net actuarial loss in accumulated other comprehensive loss that is expected to be recognized as a component of net periodic pension cost in 2016 is $2.8 million. Net periodic pension cost for the years ended December 31, consists of the following:
| 2015 |  | 2014 |  | 2013
Service cost | $ | 240 |  |  | $ | 271 |  |  | $ | 253 |
Interest cost on projected benefit obligation | 3,394 |  |  | 3,465 |  |  | 3,315 |
Expected return on plan assets | (5,697 | ) |  | (2,297 | ) |  | (5,491 | )
Amortization of loss | 3,233 |  |  | (2,048 | ) |  | 3,059 |
Settlement expense | — |  |  | — |  |  | 1,443 |
Net periodic pension (income) cost | $ | 1,170 |  |  | $ | (609 | ) |  | $ | 2,579 |
The following actuarial assumptions were used to determine our net periodic pension benefit cost for the years ended December 31,:
| 2015 |  | 2014 |  | 2013
Discount rate | 3.81 | % |  | 4.75 | % |  | 3.90 | %
Expected return on plan assets | 8.00 | % |  | 8.00 | % |  | 8.00 | %
In 2016, we are changing the method we use to estimate the interest cost component of net periodic pension cost. Historically, we estimated the interest cost component using a single weighted-average discount rate derived from the yield curve used to measure the benefit obligation at the beginning of the period. We have elected to use a full yield curve approach in the estimation of this component of benefit cost by applying the specific spot rates along the yield curve used in the determination of the benefit obligation that correlate to the relevant projected cash flows ("spot rate approach"). This change provides a more precise measurement of interest cost. This change does not affect the measurement of our total benefit obligation as the change in interest cost is completely offset by the actuarial (gain) loss reported. We have accounted for this change as a change in estimate and, accordingly, will account for it prospectively in 2016. In determining the expected return on pension plan assets, we consider the relative weighting of plan assets, the historical performance of total plan assets and individual asset classes and economic and other indicators of future performance. In addition, we consult with financial and investment management professionals in developing appropriate targeted rates of return. Asset management objectives include maintaining an adequate level of diversification to reduce interest rate and market risk and providing adequate liquidity to meet immediate and future benefit payment requirements. The allocation of pension plan assets by category is as follows at December 31,:
| Percentage of Pension Plan Assets |  | Target Allocation
| 2015 |  | 2014 |  | 2016
Equity securities | 86 | % |  | 84 | % |  | 75 | %
Debt securities | 14 |  |  | 16 |  |  | 25 |
Total | 100 | % |  | 100 | % |  | 100 | %
As of December 31, 2015, the Plan held 27,562 shares of our common stock, which had a fair value of $1.2 million. We believe that our long-term asset allocation on average will approximate the targeted allocation. We regularly review our actual asset allocation and periodically rebalance the pension plan’s investments to our targeted allocation when deemed appropriate. The following table sets forth the fair value of pension plan assets as of December 31:
| 2015 |  | 2014
Common Stock | $ | 34,466 |  |  | $ | 35,337 |
Money Market Fund | 1,302 |  |  | 3,320 |
Mutual Funds | 23,576 |  |  | 26,671 |
Fixed Income Securities | 7,824 |  |  | 8,103 |
Total Assets at Fair Value | $ | 67,168 |  |  | $ | 73,431 |
FASB guidance defines fair value and establishes a framework for measuring fair value and related disclosure requirements. A valuation hierarchy was established for disclosure of the inputs to the valuations used to measure fair value. This hierarchy prioritizes the inputs into three broad levels as follows. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, including interest rates, yield curves and credit risks, or inputs that are derived principally from, or corroborated by, observable market data through correlation. Level 3 inputs are unobservable inputs based on our own assumptions used to measure assets and liabilities at fair value. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. Following is a description of the valuation methodologies used for assets measured at fair value. There have been no changes in the methodologies used at December 31, 2015 and 2014:
Common Stock: | Common stock is valued at the closing price reported on the common stock’s respective stock exchange and is classified within level 1 of the valuation hierarchy.
Money Market Fund: | These investments are public investment vehicles valued using $1 for the Net Asset Value (NAV). The money market fund is classified within level 2 of the valuation hierarchy.
Mutual Funds: | These investments are public investment vehicles valued using the NAV provided by the administrator of the fund. The NAV is based on the value of the underlying assets owned by the fund, minus its liabilities, and then divided by the number of shares outstanding. The NAV is a quoted price in an active market and is classified within level 1 of the valuation hierarchy.
Fixed Income Securities: | Valued at the closing price reported on the active market on which the individual securities are traded and are classified within level 1 of the valuation hierarchy.
The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while the pension plan believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. The following table sets forth by level, within the fair value hierarchy, the pension plan's assets at fair value as of December 31, 2015 and December 31, 2014:
December 31, 2015 | Level 1 |  | Level 2 |  | Total
Common Stock | $ | 34,466 |  |  | $ | — |  |  | $ | 34,466 |
Money Market Fund | — |  |  | 1,302 |  |  | 1,302 |
Mutual Funds | 23,576 |  |  | — |  |  | 23,576 |
Fixed Income Securities | 7,824 |  |  | — |  |  | 7,824 |
| $ | 65,866 |  |  | $ | 1,302 |  |  | $ | 67,168 |
December 31, 2014 | Level 1 |  | Level 2 |  | Total
Common Stock | $ | 35,337 |  |  | $ | — |  |  | $ | 35,337 |
Money Market Fund | — |  |  | 3,320 |  |  | 3,320 |
Mutual Funds | 26,671 |  |  | — |  |  | 26,671 |
Fixed Income Securities | 8,103 |  |  | — |  |  | 8,103 |
| $ | 70,111 |  |  | $ | 3,320 |  |  | $ | 73,431 |
We do not expect to make any contributions to our pension plan for 2016. The following table summarizes the benefits expected to be paid by our pension plan in each of the next five years and in aggregate for the following five years. The expected benefit payments are estimated based on the same assumptions used to measure the Company’s projected benefit obligation at December 31, 2015 and reflect the impact of expected future employee service.
2016 |  | $4,164 |
2017 | 4,210 |
2018 | 4,304 |
2019 | 4,741 |
2020 | 4,982 |
2021-2025 | 24,828 |

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