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Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2018
Retirement Benefits [Abstract] |
Components of Company Plan Benefit Expense | The following table summarizes key information related to the Company’s pension plans and retirement agreements (in thousands):
| Sis Months Ended June 30, 2018 |  | Year Ended December 31, 2017
Change in Projected Benefit Obligation |  |  |
Projected benefit obligation, beginning of period | $ | 32,820 |  |  | $ | 28,624 |
Service cost | 600 |  |  | 1,001 |
Interest cost | 621 |  |  | 1,228 |
Actuarial loss | — |  |  | 2,474 |
Benefits paid | (228 | ) |  | (507 | )
Projected benefit obligation, end of period | $ | 33,813 |  |  | $ | 32,820 |
Change in Plan Assets |  |  |
Plan assets at fair value, beginning of period | $ | — |  |  | $ | — |
Company contributions | 228 |  |  | 507 |
Benefits paid | (228 | ) |  | (507 | )
Plan assets at fair value, end of period | $ | — |  |  | $ | — |
Unfunded Status of the Plan | $ | (33,813 | ) |  | $ | (32,820 | )
Components of Net Periodic Benefit Cost |
| Three Months Ended |  | Six Months Ended
| June 30, 2018 |  | June 30, 2017 |  | June 30, 2018 |  | June 30, 2017
Components of Net Periodic Benefit Cost |  |  |  |  |  |  |
Service cost | $ | 300 |  |  | $ | 250 |  |  | $ | 600 |  |  | $ | 501 |
Interest cost | 310 |  |  | 307 |  |  | 621 |  |  | 617 |
Net loss | 133 |  |  | 73 |  |  | 266 |  |  | 145 |
Net periodic pension cost | $ | 743 |  |  | $ | 630 |  |  | $ | 1,487 |  |  | $ | 1,263 |

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2439-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2410-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=77993564&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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