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Costs Associated with Exit and Restructuring Activities - Summary (Details) - Operating Earnings - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
June 2013 Plan, April 2014 Plan and June 2016 Plan |  |  |  |
Total restructuring, impairment and restructuring related charges |  |  |  |
Restructuring and impairment charges | $ 1,172 |  | $ 2,367 |
June 2013 Plan, April 2014 Plan and June 2016 |  |  |  |
Total restructuring, impairment and restructuring related charges |  |  |  |
Restructuring and impairment charges |  | $ 729 |  | $ 1,507

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- Definition Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -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(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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