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Retirement and Benefit Plans (Notes) | 6 Months Ended
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Jun. 30, 2020
Retirement Benefits [Abstract] |
Retirement and Benefit Plans | Retirement and Benefit Plans The following table presents the pension benefit costs:
| Three Months Ended June 30 |  |  |  | Six Months Ended June 30 |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
| (thousands) |  |  |  |  |  |
Service cost | $ | 166 |  |  | $ | 161 |  |  | $ | 334 |  |  | $ | 322 |
Interest cost | 1,473 |  |  | 1,809 |  |  | 2,946 |  |  | 3,625 |
Expected return on plan assets | (1,372) |  |  | (1,475) |  |  | (2,746) |  |  | (2,949) |
Amortization of actuarial (gain) loss | 201 |  |  | (44) |  |  | 403 |  |  | (87) |
Plan settlement loss | — |  |  | — |  |  | 86 |  |  | — |
Net periodic benefit expense | $ | 468 |  |  | $ | 451 |  |  | $ | 1,023 |  |  | $ | 911 |
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. We announced to plan participants that we will freeze accrual of all benefits on our qualified defined benefit pension plan (Pension Plan) effective August 31, 2020, as well as our intention to terminate the Pension Plan. During the six months ended June 30, 2020, we contributed $1.1 million in cash to the pension plans. For the remainder of 2020, we expect to make approximately $13 million in cash contributions to the pension plans, which includes the repurchase of two BMD locations leased from the Pension Plan. For information related to the contribution of properties to our qualified defined benefit pension plan, see Note 12, Retirement and Benefit Plans, of the Notes to Consolidated Financial Statements in "Item 8. Financial Statements and Supplementary Data" in our 2019 Form 10-K.

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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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