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Retirement Plans And Other Postretirement Benefits (Schedule Of Pension Plan Assets Categorized By Level Within Fair Value Measurement Hierarchy) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Contracts with insurance companies | $ 10,158 | $ 10,207
Total plan assets | 214,558 | 210,642
Large/mid-capitalization equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 31,549 | 29,027
Small-capitalization equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 11,389 | 8,457
International and emerging market equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 24,710 | 23,054
Fixed income securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 17,213 | 22,968
Private equity and hedge funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 103,686 | 110,340
Fixed Income Security NAV [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value |  | 3,862
Other assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 15,853 | 2,727
Total Plan Assets at Fair Value [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 100,714 | 86,233
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 74,642 | 60,963
Quoted Prices in Active Markets for Identical Assets (Level 1) | Large/mid-capitalization equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 31,549 | 29,027
Quoted Prices in Active Markets for Identical Assets (Level 1) | Small-capitalization equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 11,389 | 8,457
Quoted Prices in Active Markets for Identical Assets (Level 1) | International and emerging market equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 11,410 | 10,126
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed income securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 4,441 | 10,626
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 15,853 | 2,727
Significant Other Observable Inputs (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 26,072 | 25,270
Significant Other Observable Inputs (Level 2) | Large/mid-capitalization equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Small-capitalization equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | International and emerging market equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 13,300 | 12,928
Significant Other Observable Inputs (Level 2) | Fixed income securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 12,772 | 12,342
Significant Other Observable Inputs (Level 2) | Other assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 0 | 0
Significant Unobservable Inputs (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 0 | 0
Significant Unobservable Inputs (Level 3) | Large/mid-capitalization equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 0 | 0
Significant Unobservable Inputs (Level 3) | Small-capitalization equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 0 | 0
Significant Unobservable Inputs (Level 3) | International and emerging market equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 0 | 0
Significant Unobservable Inputs (Level 3) | Fixed income securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | 0 | 0
Significant Unobservable Inputs (Level 3) | Other assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total plan assets at fair value | $ 0 | $ 0

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- Definition This represents the entire assets recognized in the balance sheet that are associated with the defined benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.10) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64852052&loc=d3e1703-114919 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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