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Employee Benefit Plans | 9 Months Ended
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Sep. 30, 2017
Retirement Benefits [Abstract] |
Employee Benefit Plans | Employee Benefit Plans The following are components of the net periodic benefit cost for the pension and postretirement benefit plans maintained by the Company for the three and nine months ended September 30, 2017 and 2016:
| Pension Benefits
(in thousands) | Three months ended September 30, |  | Nine months ended September 30,
2017 |  | 2016 |  | 2017 |  | 2016
Interest cost | 38 |  |  | 49 |  |  | 116 |  |  | 145 |
Recognized net actuarial loss | 63 |  |  | 36 |  |  | 189 |  |  | 109 |
Benefit cost | $ | 101 |  |  | $ | 85 |  |  | $ | 305 |  |  | $ | 254 |
| Postretirement Benefits
(in thousands) | Three months ended September 30, |  | Nine months ended September 30,
2017 |  | 2016 |  | 2017 |  | 2016
Service cost | $ | 81 |  |  | $ | 190 |  |  | $ | 310 |  |  | $ | 570 |
Interest cost | 202 |  |  | 387 |  |  | 784 |  |  | 1,162 |
Amortization of prior service cost | (228 | ) |  | (88 | ) |  | (228 | ) |  | (266 | )
Recognized net actuarial loss | — |  |  | 192 |  |  | — |  |  | 576 |
Benefit cost | $ | 55 |  |  | $ | 681 |  |  | $ | 866 |  |  | $ | 2,042 |

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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