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Benefit Plans | 3 Months Ended
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Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract] |
Benefit Plans | Benefit Plans The following tables provide the components of net periodic benefit cost for our pension, supplemental executive retirement and other postretirement benefit plans for three months ended March 31, 2017 and 2016:
|  | Three Months Ended March 31,
|  | Pension and Supplemental Executive Retirement Plans |  | Other Postretirement Benefit Plans
(In thousands) |  | 2017 |  | 2016 |  | 2017 |  | 2016
Service cost |  | $ | 2,294 |  |  | $ | 2,163 |  |  | $ | 187 |  |  | $ | 175 |
Interest cost |  | 3,858 |  |  | 3,929 |  |  | 167 |  |  | 172 |
Expected return on plan assets |  | (5,036 | ) |  | (4,889 | ) |  | (1,312 | ) |  | (1,222 | )
Recognized net actuarial loss |  | 1,535 |  |  | 1,361 |  |  | — |  |  | — |
Amortization of prior service cost |  | (107 | ) |  | (172 | ) |  | (1,662 | ) |  | (1,662 | )
Net periodic benefit cost (benefit) |  | $ | 2,544 |  |  | $ | 2,392 |  |  | $ | (2,620 | ) |  | $ | (2,537 | )
We currently intend to make contributions totaling $9.2 million to our qualified pension plan and supplemental executive retirement plan in 2017.

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