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Employee Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2023
Retirement Benefits [Abstract] |
Components of employee benefit plan expense | The components of the employee benefit plan expense consisted of the following:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(in thousands) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Interest cost |  | $ | 5,935 |  |  | $ | 4,333 |  |  | $ | 11,870 |  |  | $ | 8,666 |
Expected return on plan assets, net of expenses |  | (6,307) |  |  | (6,224) |  |  | (12,613) |  |  | (12,448) |
Amortization of actuarial loss and prior service cost |  | 4 |  |  | 1,015 |  |  | 9 |  |  | 2,029 |
Total for defined benefit pension plan |  | (368) |  |  | (876) |  |  | (734) |  |  | (1,753) |
SERPs |  | 234 |  |  | 214 |  |  | 466 |  |  | 428 |
Defined contribution plan |  | 4,166 |  |  | 3,871 |  |  | 8,595 |  |  | 8,324 |
Net periodic benefit cost |  | $ | 4,032 |  |  | $ | 3,209 |  |  | $ | 8,327 |  |  | $ | 6,999 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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