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Retirement Plans And Postretirement Benefits (Fair Value Of Assets Of, And The Funded Status Of, Postretirement Plans) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Changes in Plan Assets: |  |  |
Fair value of plan assets at beginning of year | $ 123,463 |  |
Fair value of plan assets at end of year | 115,199 | $ 123,463 |
U.S. [Member] |  |  |
Changes in Benefit Obligation: |  |  |
Net benefit obligation at beginning of year | 139,746 | 140,230 |
Service cost | 1,315 | 1,305 | $ 1,325
Interest cost | 4,709 | 5,352 | 5,744
Foreign currency exchange rates | 0 | 0 |
Actuarial (gain) loss | (8,297) | 3,212 |
Gross benefits paid | (10,488) | (10,353) |
Net benefit obligation at end of year | 126,985 | 139,746 | 140,230
Changes in Plan Assets: |  |  |
Fair value of plan assets at beginning of year | 109,845 | 100,905 |
Employer contributions | 5,579 | 6,673 |
Gross benefits paid | (10,488) | (10,353) |
Fair value of plan assets at end of year | 99,845 | 109,845 | 100,905
Funded status: | (27,140) | (29,901) |
Prior service credit | 0 | 0 |
Current liabilities | (430) | (433) |
Non-current liabilities | (26,710) | (29,468) |
Net amount recognized | (27,140) | (29,901) |
Foreign [Member] |  |  |
Changes in Benefit Obligation: |  |  |
Net benefit obligation at beginning of year | 20,407 | 18,237 |
Service cost | 674 | 710 | 698
Interest cost | 253 | 199 | 243
Foreign currency exchange rates | (339) | 1,069 |
Actuarial (gain) loss | 711 | 63 |
Gross benefits paid | (234) | (123) |
Net benefit obligation at end of year | 22,332 | 20,407 | 18,237
Changes in Plan Assets: |  |  |
Fair value of plan assets at beginning of year | 13,618 | 11,871 |
Employer contributions | 726 | 658 |
Gross benefits paid | (234) | (123) |
Fair value of plan assets at end of year | 15,354 | 13,618 | 11,871
Funded status: | (6,978) | (6,789) |
Prior service credit | 0 | 0 |
Current liabilities | (117) | (146) |
Non-current liabilities | (7,008) | (6,643) |
Net amount recognized | (6,978) | (6,789) |
Postretirement Benefit Costs [Member] | U.S. [Member] |  |  |
Changes in Benefit Obligation: |  |  |
Net benefit obligation at beginning of year | 8,461 | 10,175 |
Service cost | 0 | 0 | 0
Interest cost | 264 | 333 | 360
Foreign currency exchange rates | 0 | 0 |
Actuarial (gain) loss | 1,028 | 1,257 |
Gross benefits paid | (532) | (790) |
Plan amendment | 0 | 0 |
Net benefit obligation at end of year | 7,165 | 8,461 | 10,175
Changes in Plan Assets: |  |  |
Fair value of plan assets at beginning of year | 0 | 0 |
Employer contributions | 532 | 790 |
Gross benefits paid | (532) | (790) |
Fair value of plan assets at end of year | 0 | 0 | 0
Funded status: | (7,165) | (8,461) |
Prior service credit | 0 | 0 |
Current liabilities | (783) | (855) |
Non-current liabilities | (6,382) | (7,606) |
Net amount recognized | (7,165) | (8,461) |
Postretirement Benefit Costs [Member] | Foreign [Member] |  |  |
Changes in Benefit Obligation: |  |  |
Net benefit obligation at beginning of year | 12,172 | 10,700 |
Service cost | 1 | 2 | 4
Interest cost | 700 | 653 | 764
Foreign currency exchange rates | (1,333) | 931 |
Actuarial (gain) loss | (47) | (742) |
Gross benefits paid | (926) | (856) |
Plan amendment | 0 | 0 |
Net benefit obligation at end of year | 10,661 | 12,172 | 10,700
Changes in Plan Assets: |  |  |
Fair value of plan assets at beginning of year | 0 | 0 |
Employer contributions | 926 | 856 |
Gross benefits paid | (926) | (856) |
Fair value of plan assets at end of year | 0 | 0 | $ 0
Funded status: | (10,661) | (12,172) |
Prior service credit | 0 | 0 |
Current liabilities | (851) | (912) |
Non-current liabilities | (9,810) | (11,260) |
Net amount recognized | $ (10,661) | $ (12,172) |

X
- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive 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 (a)(4) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans. + 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 (c) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + 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 (a)(6) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of (increase) decrease in benefit obligation of defined benefit plan from event reducing expected years of future service of present employees or eliminating accrual of benefits for some or all future services of present employees. + 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 (a)(10) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation 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 (a)(5) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. + 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 (c) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 + Details
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