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Employee Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2018
Retirement Benefits [Abstract] |
Schedule of net periodic cost (benefit) | The components of net periodic cost (benefit) of plans sponsored by us are as follows for the three and six months ended June 30, 2018 and 2017:
| Three Months Ended June 30, | Six Months Ended June 30,
| 2018 | 2017 | 2018 | 2017
Service cost | $ | 5 |  | $ | 5 |  | $ | 10 |  | $ | 8 |
Interest cost | 18 |  | 7 |  | 36 |  | 14 |
Expected return on plan assets | (30 | ) | (10 | ) | (60 | ) | (20 | )
Amortization of net actuarial loss | 2 |  | 2 |  | 4 |  | 5 |
Net periodic cost (benefit) | $ | (5 | ) | $ | 4 |  | $ | (10 | ) | $ | 7 |

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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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