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Restructuring - Additional Information (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) employee | Dec. 31, 2015 USD ($) employee | Dec. 31, 2014 USD ($) employee
Restructuring Cost and Reserve [Line Items] |  |  |
Pre-tax restructuring expenses related to restructuring initiative | $ 3,674 | $ 11,239 | $ 13,672
Restructuring liabilities | 3,893 | 6,636 | 6,056
Minimum |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | 2,000 |  |
Maximum |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and Related Cost, Expected Cost | 3,000 |  |
2016 Initiative |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Pre-tax restructuring expenses related to restructuring initiative | $ 3,674 |  |
Number of employees | employee | 129 |  |
2015 Initiative |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Pre-tax restructuring expenses related to restructuring initiative |  | $ 11,239 |
Number of employees | employee |  | 208 |
2014 Initiative |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Pre-tax restructuring expenses related to restructuring initiative |  |  | $ 13,672
Number of employees | employee |  |  | 217

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- Definition Amount expected to be recognized in earnings for the specified 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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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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