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Benefit Plans | 3 Months Ended
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Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract] |
BENEFIT PLANS | BENEFIT PLANS We sponsor several defined benefit pension plans. Additionally, we provide varying levels of postretirement health care and life insurance benefits to some U.S. employees. The table below summarizes the components of net periodic pension income:
| Three Months Ended September 30,
(in thousands) | 2016 |  | 2015
Service cost | $ | 733 |  |  | $ | 1,163 |
Interest cost | 7,809 |  |  | 9,485 |
Expected return on plan assets | (14,757 | ) |  | (14,709 | )
Amortization of transition obligation | 23 |  |  | 21 |
Amortization of prior service credit | (113 | ) |  | (104 | )
Recognition of actuarial losses | 2,112 |  |  | 1,833 |
Special termination benefit charge | — |  |  | 54 |
Net periodic pension income | $ | (4,193 | ) |  | $ | (2,257 | )
The special termination benefit charge of $0.1 million during the three months ended September 30, 2015 is the result of lump sum payments to several terminated Executive Retirement Plan participants. The table below summarizes the components of net periodic other postretirement benefit cost:
| Three Months Ended September 30,
(in thousands) | 2016 |  | 2015
Interest cost | $ | 168 |  |  | $ | 210 |
Amortization of prior service credit | (6 | ) |  | (6 | )
Recognition of actuarial loss | 89 |  |  | 81 |
Net periodic other postretirement benefit cost | $ | 251 |  |  | $ | 285 |

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