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Retirement Benefits - Pretax Amounts Recognized in Accumulated Other Comprehensive Income Loss (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
U.S. Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Prior service cost (credit) | $ 110 | $ 135
Net loss | 27,860 | 33,461
Total | 27,970 | 33,596
Net gain (loss) in current year | (23) |
Prior service cost | 0 |
Amortization of prior service cost (credit) | 24 |
Amortization of net loss (gain) | 6,541 |
Exchange rate effect on amounts in OCI | 0 |
Total | 6,542 |
Non-U.S. Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Prior service cost (credit) | (77) | (38)
Net loss | (17,643) | 15,330
Total | (17,720) | 15,292
Net gain (loss) in current year | (5,367) |
Prior service cost | 0 |
Amortization of prior service cost (credit) | (15) |
Amortization of net loss (gain) | 1,239 |
Exchange rate effect on amounts in OCI | 1,468 |
Total | (2,675) |
Other Postretirement Benefit Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Prior service cost (credit) | (849) | (1,215)
Net loss | (3,852) | (2,197)
Total | (4,701) | $ (3,412)
Net gain (loss) in current year | 1,990 |
Prior service cost | 0 |
Amortization of prior service cost (credit) | (366) |
Amortization of net loss (gain) | (340) |
Exchange rate effect on amounts in OCI | 5 |
Total | $ 1,289 |

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- Definition The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580 + Details
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- Definition Amount related to the pretax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Prior Service Cost -URI http://asc.fasb.org/extlink&oid=49177896 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580 + Details
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