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Postretirement Benefit Obligations (Tables) | 9 Months Ended
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Sep. 30, 2018
Retirement Benefits [Abstract] |
Schedule of Net Benefit Costs | The components of net periodic benefit cost of the Company’s pension plan are as follows:
|  |  |  |  | Three Months Ended September 30, |  |  |  |  | Nine Months Ended September 30, |  |
|  |  |  |  | 2018 |  |  | 2017 |  | 2018 |  | 2017
Service costs |  |  |  |  | $ | 2,001 |  |  | $ | 1,908 |  | $ | 6,004 |  | $ | 5,724
Interest costs |  |  |  |  | 469 |  |  | 333 |  | 1,407 |  | 999
Expected return on plan assets |  |  |  |  | (287) |  |  | (76) |  | (862) |  | (228)
Net periodic benefit cost |  |  |  |  | $ | 2,183 |  |  | $ | 2,165 |  | $ | 6,549 |  | $ | 6,495

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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