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Restructuring Expenses (Tables) | 3 Months Ended | 12 Months Ended
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Mar. 31, 2018 | Dec. 31, 2017
Restructuring and Related Activities [Abstract] |  |
Schedule of restructuring and related costs | The following table provides the year-to-date activity of the Company’s restructuring reserves as of March 31, 2018:
(in thousands) |  | Lease Liability |
Reserve balance at December 31, 2017 |  | $ | 604 |
Charges |  |  | — |
Payments/Utilizations |  |  | (58 | )
Reserve balance at March 31, 2018 |  | $ | 546 |
| The following table provides the year-to-date activity of the Company’s restructuring reserves as of December 31, 2017:
(in thousands) |  | Lease Liability |
Reserve balance at December 31, 2016 |  | $ | 820 |
Charges |  |  | — |
Payments/Utilizations |  |  | (216 | )
Reserve balance at December 31, 2017 |  | $ | 604 |

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 + Details
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