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Pension Benefits (Tables) | 9 Months Ended
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Sep. 30, 2016
Pension Benefits [Abstract] |
Schedule of Net Benefit Costs [Table Text Block] | The net periodic pension cost for the three and nine months ended September 30, 2016 and 2015 were as follows (in thousands):
|  | Three months ended September 30, |  | Nine months ended September 30,
|  | 2016 |  | 2015 |  | 2016 |  | 2015
Components of net periodic benefit cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 368 |  |  | $ | 400 |  |  | $ | 1,104 |  |  | $ | 1,200 |
Interest cost |  |  | 344 |  |  |  | 325 |  |  |  | 1,032 |  |  |  | 975 |
Expected return on plan assets |  |  | (563 | ) |  |  | (525 | ) |  |  | (1,689 | ) |  |  | (1,575 | )
Recognized net actuarial loss |  |  | 314 |  |  |  | 300 |  |  |  | 942 |  |  |  | 900 |
Net periodic pension cost |  | $ | 463 |  |  | $ | 500 |  |  | $ | 1,389 |  |  | $ | 1,500 |

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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=65897934&loc=d3e1928-114920 + Details
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