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Retirement and Benefit Plans | 3 Months Ended
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Mar. 31, 2019
Retirement Benefits [Abstract] |
Retirement and Benefit Plans | Retirement and Benefit Plans The following table presents the pension benefit costs:
| Three Months Ended March 31
| 2019 |  | 2018
| (thousands)
Service cost | $ | 161 |  |  | $ | 205 |
Interest cost | 1,816 |  |  | 4,011 |
Expected return on plan assets | (1,474 | ) |  | (4,588 | )
Amortization of actuarial (gain) loss | (43 | ) |  | 821 |
Net periodic benefit expense | $ | 460 |  |  | $ | 449 |
Service cost is recorded in the same income statement line items as other employee compensation costs arising from services rendered, and the other components of net periodic benefit expense are recorded in "Pension expense (excluding service costs)" in our Consolidated Statements of Operations. During the three months ended March 31, 2019, we contributed $0.5 million in cash to the pension plans. For the remainder of 2019, we expect to make approximately $1.4 million in cash contributions to the pension plans.

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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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