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Employee Benefit Plans - Actuarial Assumptions (Details) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items] |  |  |
Document Fiscal Year Focus | 2018 |  |
Foreign Plan [Member] |  |  |
Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Discount rate | 2.78% | 2.40% |
Average wage increase | 4.41% | 4.46% |
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Discount rate | 2.40% | 2.60% | 3.72%
Average wage increase | 4.46% | 4.55% | 4.16%
Expected return on plan assets | 5.64% | 5.80% | 6.42%
Foreign Plan [Member] | PHILIPPINES |  |  |
Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Discount rate | 8.25% | 0.00% |
Average wage increase | 6.00% | 0.00% |
Foreign Plan [Member] | Taiwan |  |  |
Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Discount rate | 1.25% | 1.25% |
Average wage increase | 4.25% | 4.00% |
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Discount rate | 1.25% | 1.50% | 1.10%
Average wage increase | 4.00% | 4.00% | 4.00%
Expected return on plan assets | 1.50% | 1.75% | 1.50%
Foreign Plan [Member] | United Kingdom |  |  |
Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |
Discount rate | 2.80% | 2.44% |
Average wage increase | 4.40% | 4.50% |
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |
Discount rate | 2.44% | 2.64% | 3.90%
Average wage increase | 4.50% | 4.60% | 4.25%
Expected return on plan assets | 5.75% | 5.90% | 6.50%

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- Definition Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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